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Title: Food in War Time
Author: Graham Lusk
Release Date: May 21, 2010 [EBook #32472]
Language: English
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Transcriber's Note:
In the plain-text versions, italics are represented with _underscores_,
and bold text with {braces}.
The following corrections were made to the text: Du Bois to DuBois (p.
45, Index entry) and Oleomargarin to Oleomargarine (p. 46, Index entry).
The variant spelling "calory" (p. 32) has been retained.
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FOOD IN WAR TIME
_By_
GRAHAM LUSK
PROFESSOR OF PHYSIOLOGY, CORNELL UNIVERSITY MEDICAL COLLEGE IN
NEW YORK CITY
PHILADELPHIA AND LONDON
W. B. SAUNDERS COMPANY
1918
Copyright, 1918
by
W. B. SAUNDERS COMPANY
***
PRINTED IN AMERICA
DEDICATED
TO MY
FELLOW-COUNTRYMEN
CONTENTS
PAGE
I. A BALANCED DIET 7
II. CALORIES IN COMMON LIFE 23
III. RULES OF SAVING AND SAFETY 43
INDEX 45
NOTE
The major parts of this small volume appeared under articles entitled
"Food in War Time" in the _Scientific Monthly_ and "Calories in Common
Life" in Saunders' _Medical Clinics of North America_.
FOOD IN WAR TIME
I
A BALANCED DIET
There is no doubt that under the conditions existing before the war the
American people lived in a higher degree of comfort than that enjoyed in
Europe. Hard times in America have always been better times than the
best times in Europe. As a student in Munich in 1890 I remember paying
three dollars a month for my room, five cents daily for my breakfast,
consisting of coffee and a roll without butter, and thirty-five cents
for a four-course dinner at a fashionable restaurant. This does not
sound extravagant, but it represents luxury when compared with the diet
of the poorest Italian peasants of southern Italy. Two Italian
scientists describe how this class of people live mainly on cornmeal,
olive oil, and green stuffs and have done so for generations. There is
no milk, cheese, or eggs in their dietary. Meat in the form of fat pork
is taken three or four times a year. Cornmeal is taken as "polenta," or
is mixed with beans and oil, or is made into corn bread. Cabbage or the
leaves of beets are boiled in water and then eaten with oil flavored
with garlic or Spanish pepper. One of the families investigated
consisted of eight individuals, of whom two were children. The annual
income was 424 francs, or $84. Of this, three cents per day per adult
was spent for food and the remaining three-fifths of a cent was spent
for other purposes. Little wonder that such people have migrated to
America, but it may strike some as astonishing that a race so nourished
should have become the man power in the construction of our railways,
our subways, and our great buildings.
Dr. McCollum will tell you that the secret of it all lies in the green
leaves. The quality of the protein in corn is poor, but the protein in
the leaves supplements that of corn, so that a good result is obtained.
Olive oil when taken alone is a poor fat in a nutritive sense, but when
taken with green leaves, these furnish that one of the peculiar
accessory substances, commonly known as vitamines, which is present most
abundantly in butter-fat, and gives to butter-fat and to the fat in
whole milk its dominant nutritive value. The green leaves likewise
furnish another accessory substance, also present in milk, a substance
which is soluble in water and which is necessary for normal life.
Furthermore, the green leaves contain mineral matter in considerable
quantity and in about the same proportions as they exist in milk.
Here then is the message of economy in diet, corn the cheapest of all
the cereals, a vegetable oil cheaper by far than animal fat, which two
materials taken together would bring disaster upon the human race, but
if taken with the addition of cabbage or beet-tops they become capable
of maintaining mankind from generation to generation. One can safely
refer to such a diet as a balanced diet. Just as in the case of the
modern experimental biological analysis of a balanced ration in which
such a ration is given to rats and its efficiency as a diet is tested by
its capacity to support normal growth and reproduction of the species,
so here the experimental evidence is presented that corn and olive oil
may become a sustaining diet when green leaves are a supplementary
factor.
This preliminary sketch shows several important fundamentals of food and
nutrition. If one gives an animal a mixture of purified food-stuffs,
pure protein, pure starch, purified fat, and a mixture of salts like the
salts of milk, the animal will surely die. But if one substitutes
butter-fat for purified fat, and adds a water solution of the natural
salts of milk, the animal lives and thrives.
Again, the illustration shows how corn may be so supplemented with
other food-stuffs as to become extremely valuable in nutrition. It is
especially valuable at the present time because corn is comparatively
cheap and plentiful. But one asks how about pellagra? It must be here
definitely stated that the use of cornmeal is not the cause of pellagra,
provided the right kind of other foods be taken with it. Pellagra occurs
in the "corn belt" of the United States, and especially among the poorer
classes in the south. The disease has developed since the introduction
in 1880 of highly perfected milling machinery which furnishes corn and
wheat completely freed from their outer coverings. In Italy, where the
milling of corn is still primitive, pellagra is not so severe as with
us, because the corn offal is not completely removed and this contains
the accessory food substances or vitamines which are essential to life.
Pellagra is generally believed to be produced by a too exclusive use of
highly milled corn and wheat flour in association with salt meats and
canned goods, all of which are deficient in vitamines. The administration
of fresh milk is naturally indicated. Goldberger states that after the
addition of milk to the diet of a pellagrin, the typical clinical
picture of pellagra no longer persists. The poor in the mill towns of
the South lived too exclusively upon a corn diet without admixture of
milk or fresh animal food or even of cabbage, and pellagra has been the
consequence.
The Food Administrator asks us to eat corn bread and save the wheat for
export. It is a very small sacrifice to eat corn bread at one meal or
more a day. Indian corn saved our New England ancestors from starvation,
and we can in part substitute it for our wheat and send the latter
abroad to spare others from starvation. The simplest elements of
patriotism demand that we do this. Therefore let us cry, "Eat corn bread
and save the wheat for France, the home of Lafayette!"
The United States Department of Agriculture has estimated that only 6.6
per cent. of our corn crop is used for human food, and of this, 3.4 per
cent. is consumed by the farmers and their families.
The substitution of foods is no new thing. We find that an English
contemporary author thus described the food habits of the English people
during the "golden days of Good Queen Bess," three hundred and fifty
years ago:
"The gentilitie commonly provide themselves sufficiently of
wheat for their own tables, whylest their household and poore
neighbours in some shires are forced to content themselves
with rye or barleie; yea and in time of dearth many with bread
made eyther of beanes, peason[1] or otes, or of altogether and
some acornes among."
[1] An obsolete plural of pease.
A difference between those days and ours is that the "gentilitie" and
the "poore neighbours" are now asked to unite in reducing the
consumption of wheat and to do this for the safety and welfare of all
mankind.
Another point in war economy is the use of whole milk in greater
quantity, and the diminution of the use of butter and cream. Cream is
bought only by the wealthy, but in sufficient volume to largely reduce
the amount of whole milk available. In Germany before the war 15 per
cent. of the milk supply of that country was used for the production of
cream. The consequent restriction of the milk supply was distinctly to
the detriment of the health of the peasant farmers of Bavaria. Regarding
the use of butter, a Swiss professor, himself an expert in nutrition,
complains that whereas in his youth children were never given butter on
their bread for breakfast, not even when there was no jam in the house,
yet to-day absence of butter from the table is held to be indicative of
direst poverty.
If one takes a pint of whole milk daily, or even, as we have seen,
cabbage or beet-tops in its stead, one may take fat in the forms of
olive oil or cottonseed oil, corn oil, cocoanut oil, peanut butter, or
in other vegetable oils, without possible prejudice to health.
Osborne and Mendel, and more recently Halliburton, have pointed out that
oleomargarine as prepared from beef-fat contains the fat-soluble
growth-promoting accessory substance or vitamine which is present in
butter-fat, but which is not contained in vegetable oils or in lard.
Halliburton and Drummond summarize the practical results of their work
as follows:
But when we approach the subject of the dietary of the poorer
classes, the question is a more serious one. In ordinary times
the consumption of beef dripping, which is considerable among
the poor, would to a large extent supply the lacking
properties of a vegetable-oil margarine. But at the present
time beef itself is expensive, and the opportunities of
obtaining dripping are therefore minimized. At the same time
the three important foods for children already enumerated
(milk, butter, eggs) have risen in cost, so as to be almost
prohibitive to those with slender incomes. The vegetable-oil
margarines still remain comparatively cheap, and the danger is
that unless measures are taken to insure a proper milk supply
for infants at a reasonable charge, these infants may run the
risk of being fed, so far as fat is concerned, entirely upon
an inferior brand of margarine, destitute of the
growth-promoting accessory substance. It would be truer
economy even for the poor to purchase smaller quantities of an
oleo-oil margarine if they cannot afford the luxury of real
butter.
The legal restrictions placed upon the sale of oleomargarine and the
taxes enhancing its cost, now in operation in many of our states, are
without warrant in morals or common sense and should be entirely
abolished in times like these. A well-made brand of oleomargarine is
much more palatable than butter of the second grade, and certainly for
cooking purposes is just as valuable.
Whole milk contains everything necessary for growth and maintenance,
protein, fat, milk-sugar, salts, water, and the unknown but invaluable
accessory substances. It is of such prime importance that each family
should have this admirable food that I have suggested that no family of
five should ever buy meat until they have bought three quarts of milk.
The insistence by scientific men upon the prime importance of milk has
probably had something to do with its rapid enhancement in price. This
latter factor is greatly to be regretted. I have often wondered why it
was that a quart bottle of a fancy brand of milk in New York should cost
about as much as a quart of _vin ordinaire_ on the streets of Paris, and
a quart bottle of cream as much as a quart of good champagne in Paris.
Despite much denial it appears to me that milk is not sold as cheaply as
it ought to be. Everything should be done to conserve our herds of cows
for the increased supply of whole milk and incidentally for the
manufacture of cheese and of milk powder or of condensed milk.
If one takes milk with other foods, meat may be dispensed with. Thus
Hindhede advocates as ideal a diet consisting of bread, potatoes, fruit,
and a pint of milk. Splendid health, both of body and mind, the
peasants' comparative immunity to indigestion, kidney and liver disease,
as well as an absolute immunity to gout, is the alluring prospect held
out by the following dietary:
Graham bread 1 pound
Potatoes 2 pounds
Vegetable fat ½ pound
Apples 1½ pounds
Milk 1 pint
This bread-potato-fruit diet gives a very excellent basis of wholesome
nutrition. The potatoes yield an alkaline ash which has a highly solvent
power over uric acid, and, therefore, a good supply of these valuable
tubers is needed by the nation.
To most Americans the dietary factors here described will appear to be
merely attenuated hypotheses, fit only for philosophic contemplation.
For, in real life, it is the roast beef of Old England, or some other
famed equivalent, that makes its appeal. Far be it from me to disparage
the feast following a hunt of the wild boar or other feasts famed in
song and story, but that is not the question. The question is, is meat
necessary? The description of the Italian dietary answers this in the
negative.
But is meat desirable? The Italian experimenters believed that the
addition of four or eight ounces of meat to the dietaries of some of
their subjects increased their physical and also their mental powers.
The increase in mental power due to change in diet has always seemed to
me to be a figment of the imagination and not susceptible of
demonstration. Thomas lived for twenty-four days on a diet of starch and
cream, during four days of which time the very small quantity of three
ounces of meat was taken daily, and he found his mental and muscular
power unchanged.
A remarkable experiment on the effect of a potato diet has been
reported by Hindhede. An individual partook of a diet of between four
and one-half and nine pounds of potatoes daily, with some vegetable
margarine, during a period of nearly three hundred days. The rule was to
eat only when hungry and then the potatoes could be taken at the rate of
an ounce a minute. During the last three months (ninety-five days) of
the experiment severe mechanical work was performed and the total food
intake for the latter period amounted to 770 pounds of potatoes and 48
pounds of margarine. What could be more simple than stocking the cellar
with coal, potatoes, and a tub of margarine! Who then would worry about
the complexities of modern life?
Of course, vegetarianism is no new thing. Its principal exponent was
Sylvester Graham. It so happens that he was the brother of my great
grandmother, and of him my father wrote in 1861, "long lanky Sylvester
Vegetable Graham, leanest of men." Graham in 1829 began the advocacy of
moderation in the use of a diet consisting of vegetables, Graham bread,
fruits, nuts, salts and pure water, and excluding meat, sauces, salads,
tea, coffee, alcohol, pepper, and mustard. The first effect of this
diet, which largely eliminated the flavors, was to reduce the weight
through lowering the intake of food, but the health of many followers of
the diet appears to have been benefited. The "Graham System" of dieting
suffered from withering criticism at the time. He published in 1837 a
little book entitled, "Bread and Bread Making," bearing on its cover the
scriptural quotation "Bread strengtheneth man's heart." He says in this
volume:
But while the people of our country are entirely given up as
they are at present, to gross and promiscuous feeding on the
dead carcasses of animals and to the untiring pursuit of
wealth, it is perhaps wholly vain for a single individual to
raise his voice on a subject of this kind.
The well-known work of Chittenden has shown that when the protein
intake is reduced by one half or less of that which the average American
appetite suggests, professional men, soldiers and athletes may be
maintained in the best physical condition. One of Yale's champion
intercollegiate athletes won all the events of the year in which he was
entered while living on a reduced protein or Chittenden diet. Upon such
a diet, or less than that, the people of Germany are now living to-day.
The principle involves eating meat very sparingly, taking half a piece
where one would have formerly been taken, and using it only for its
flavor. The wing of a chicken has little meat on it and yet if eaten
together with vegetables it gives the meal a different quality than it
would have had without it, and to this extent its use is warranted. The
muscles are active when hard labor is done, but the muscles do not need
meat for the performance of their work. A fasting man may have
considerable power. The popular idea of the necessity of meat for a
laboring man may be epitomized in the statement: a strong man can eat
more meat than a weak one, hence meat makes a man strong. The
proposition is evidently absurd.
Not only is the taking of meat without beneficial relation to the
capacity for muscular work, but, in fact, an exclusive meat diet results
in the sensation that work is being accomplished with difficulty. When
meat is metabolized it stimulates the body to a higher heat production,
as great an increase as 55 per cent. having been observed in a resting
man. No other food-stuff will accomplish so great an increase. It is
especially worthy of note that this increase in the heat production, due
to the _specific dynamic action_ of protein, as it is called, cannot be
utilized in the execution of mechanical work. When the organism of a
laborer at work in a hot environment is called upon to eliminate extra
heat, due to the work he is performing, he must also eliminate the quota
of heat which is derived from any large ingestion of meat. Hence, the
American farmer in the hot weather can eat little meat.
So far as is known, taking meat even in large excess is not harmful, but
it represents luxury and waste. According to an oral statement by A. E.
Taylor, the results of many thousand urinary analyses in Germany during
the second year of the war showed about 7 grams of nitrogen excreted,
which would correspond to a dietary containing about 45 grams of
protein. As a matter of fact, this is the equivalent of the reduced
protein dietary of Chittenden, and it is reported that no ill effects
can be attributed to it. The flavor of meat is such that it lends itself
to the easy preparation of a palatable meal, but this flavor could
undoubtedly be as well obtained if the present consumption of meat were
cut in two. It is a question of habit, but with the present reduced
supply of meat one must adopt new habits. It would be highly desirable
if the grain now fed to fatten beef were given to maintain herds of
milch cows.
Indulgence in meat is due to the desire for strong flavor. With the
increased distribution of wealth, the demand for meat grows. Its
consumption by all classes had vastly increased in all prosperous
countries prior to the war. It is well, however, to remember that its
use has been excessive and unnecessary, and its price can be cut by
wholesale voluntary abstinence. The British people have suffered no
hardship in the recent reduction of their meat ration.
A British Commission has reported to Parliament that it takes three
times as much fodder to produce beef as it does to produce milk or pork
of the same food value. Since cows eat chiefly hay and grass and pigs
eat grain the cost of the production of a unit value of milk is much
less than the cost of the same value in the form of pork. It takes only
fifty per cent. more fodder to produce veal than to produce pork. Milk,
pork, and veal have long been the established protein-containing foods
of nations on the continent of Europe. According to these figures beef
should cost in the market twice what veal costs, and yet the butcher
charges nearly the same for the two. It would save food for milk
production if steers were eaten as veal and not fed up into beef cattle.
A suitable tax on all steers over a year old would accomplish this
result. If all heifers were developed into milch cows and no cow capable
of giving milk in quantity were slaughtered, the country would be placed
on a much better basis than at present. It might make beef expensive,
but there is every reason why it should be expensive. It would increase
the dairy business, which is evidently a need of the times, something
for the protection of the welfare of mankind. For it must be remembered
that a well-nourished cow during a single year will give in the form of
milk as much protein and two and a half times the number of calories as
are contained in her own body.
This was written before the publication of the following words of
Armsby, the foremost authority on animal nutrition:[2]
Roast pig, to those who like it, is not only a delicacy but a
valuable article of diet, but nevertheless, it is possible to
pay too high a price for it, and while a proposal to restrict
rather than to promote meat production in the present crisis
may appear both irrational and unpatriotic it may nevertheless
be in the interest of true food economy....
It may be roughly estimated that about 24 per cent. of the
energy of grain is recovered for human consumption in pork,
about 18 per cent. in milk and only about 3.5 per cent. in
beef and mutton. In other words, the farmer who feeds bread
grains to his stock is burning up 75 to 97 per cent. of them
in order to produce for us a small residue of roast pig, and
so is diminishing the total stock of human food....
The task of the stock feeder must be to utilize through his
skill and knowledge the inedible products of the farm and
factory, such as hay, corn stalks, straw, bran, brewers' and
distillers' grains, gluten feed, and the like, and to make at
least a fraction of them available for man's use. In so doing
he will be really adding to the food supply and will be
rendering a great public service. Rather than seek to
stimulate live stock husbandry the ideal should be to adjust
it to the limits set by the available supply of forage crops
and by-product feeding stuffs while, on the other hand,
utilizing these to the greatest practicable extent, because in
this way we save some of what would otherwise be a total
loss....
The hog is the great competitor of man for the higher grades
of food, and in swine husbandry as ordinarily conducted we are
in danger of paying too much for our roast pig. Cattle and
sheep, on the other hand, although less efficient as
converters, can utilize products which man can not use and
save some of their potential value as human food. From this
point of view, as well as on account of the importance of milk
to infants and invalids, the high economy of food production
by the dairy cow deserves careful consideration, although of
course the large labor requirement is a counterbalancing
factor.
At any rate, it is clear that at the present time enthusiastic
but ill-considered "booming" of live stock production may do
more harm than good. If it is desirable to restrict or
prohibit the production of alcohol from grain or potatoes on
the ground that it involves a waste of food value, the same
reason calls for restriction of the burning-up of these
materials to produce roast pig. This means, of course, a
limited meat supply. To some of us this may seem a hardship.
Meat, however, is by no means the essential that we have been
wont to suppose and partial deprivation of it is not
inconsistent with high bodily efficiency. Certainly no
patriotic citizen would wish to insist on his customary
allowance of roast pig at the cost of the food supply of his
brothers in the trenches.
[2] "Roast Pig," _Science_, 1917, xlvi, 160.
The United States Department of Agriculture has estimated that a pig
that has reached the weight of 150 pounds should be slaughtered, because
beyond that weight the cost of the quantity of feed required to maintain
the animal is out of proportion to the gain in food value of the pig.
One might, therefore, call a pig weighing 150 pounds a _maximal economic
hog_.
II
CALORIES IN COMMON LIFE
A person is properly nourished who receives adequate energy in the form
of carbohydrate and fat (and incidentally protein); adequate material
for repair of wornout parts, such as protein and mineral salts; and the
diet must contain certain accessory food substances known as food
hormones or "vitamins." Also, it must contain water. But this is not
all, for the food offered must be acceptable to the palate of the
individual. A member of the French Scientific Commission which visited
the United States in the summer of 1917, when questioned regarding the
use of corn bread in France, replied "on ne peut pas changer des
habitudes." The proper nutrition of an individual depends, therefore,
not only upon a sufficient supply of food from a mechanistic standpoint,
but also upon the reasonable satisfaction of the sense of appetite.
These dual fundamentals of proper nutrition should be ever borne in
mind.
Heat from the sun enters into the composition of the food substances
when they are being built up in the plants, and this energy, which is
latent in the food, is set free in the animal body and is used as the
source of power behind all the physical activities of the body. The
energy can all be recovered as heat and measured in the form of
calories. According to the principles of the law of the conservation of
energy, heat is not destructible. The understanding of the value of a
calorie is indispensable for the comprehension of nutrition. A calorie
is the measure of a unit of heat, or the quantity of heat necessary to
raise a liter of water from 0° to 1° Centigrade. Apparatus has been
invented for measuring the heat production of a man, an apparatus which
is called a calorimeter or a measurer of calories. If one puts a man
weighing, say, 156 pounds in the box of such an apparatus, so that he
lies comfortably on a bed in complete muscular relaxation, and before
his breakfast, one finds that he produces 70 calories an hour. Only in
certain types of disease is there any variation from this normal, though
of course the weight of the man makes a difference in his requirement
for energy. If, at the same time the subject is in the box, the quantity
of oxygen which he absorbs is measured and if certain other chemical
analyses be carried out, one can calculate the exact amounts of protein,
fat, and sugar which have been oxidized by this oxygen. Now, if one
calculates how much heat ought to have been set free from the oxidation
of these quantities of protein fat and carbohydrate, it is discovered
that the heat which ought to have been produced is exactly that quantity
which was measured as having been produced by the man. This measurement
represents the _basal metabolism_ of a man at complete rest, when his
oxidative activities are at their lowest ebb.
The basal metabolism as measured by 70 calories per hour in the case of
this individual represents the sum of the fuel needed--(1) to maintain
the beating of the heart, which every minute of a man's life moves the
blood or one-twentieth part of the weight of the body, in a circle
through the blood-vessels; (2) to maintain the muscles of respiration
that the blood may be purified in the lungs; (3) to maintain the body
temperature at that constant level which is so characteristic that a
slight variation signifies illness, and (4) to maintain in the living
state the numerous tissues of the body. Any extraneous muscular
movements are carried out in virtue of an increased oxidation of
materials and the heat production rises above the level of the basal
metabolism with increased muscular effort. For a long time the power for
the maintenance of the human machine can be furnished by its own body
fat, as is seen in cases of prolonged fasting, but usually the power is
derived instead from the food-fuel which is taken. The great question in
the world to-day is whether or not a sufficient quantity of food-fuel is
available to support the human family. The question of calories is not
an academic one, but an intensely practical one.
Science strives to express itself in mathematic terms, and this paper is
written with that end in view.
Phenomena of life are phenomena of motion. These motions are maintained
at the expense of chemical energy liberated in the oxidative breakdown
of carbohydrate, fat, and protein. Furthermore, the protein structure of
the body cells and the salts of the bones and other tissues are in a
constant state of wearing down. The energy for the human machine and the
materials for its self-repair are taken in the form of food. The general
term _metabolism_ includes all the chemical activities which take place
under the influence of living cells.
The total quantity of heat produced by the body is a measure of the
intensity of the oxidation of carbohydrate, fat, and protein within the
body.
It is important to know definitely whether there is any constant measure
of the level of the basal metabolism in normal people, so that one may
determine in cases of disease whether the heat production is normal or
increased or decreased.
Rubner discovered that the heat production of mammalia during rest was
the same per square meter of surface whether the being was a horse, a
man, a dog, or a mouse. The proposition has appeared so improbable as to
call forth much antagonism. DuBois deserves the credit of having
established this relationship for man beyond the possibility of a doubt.
He was able to do this on account of his discovery of a new and accurate
method of measuring the area of the body surface. It appears from his
work that the _basal metabolism_ for men between twenty and fifty years
old is approximately 40 calories per hour per square meter of body
surface, within a ± error of 10 per cent.
Boothby has found that the metabolism of patients who have recovered
their health after hospital operations and who have been confined in the
hospital between twenty and fifty days does not vary from the normal
standard of DuBois.
It has been found by DuBois that the basal metabolism in boys of twelve
is 25 per cent. higher than for an adult of the same height and weight,
or {50} calories per square meter of body surface; and that in boys of
fifteen the metabolism is 11 per cent. higher than for the adult of the
same size and shape, or {44} calories per square meter of body surface
(unpublished work of DuBois). These results explain the large appetites
of boys.
Women show a metabolism which is 7 per cent. lower than that of men, or
{37} calories per hour per square meter of surface.
From the charts of the average heights and weights of men varying
between fifteen and fifty-five years old, given by American life
insurance companies, Mr. H. V. Atkinson, of my laboratory, has
calculated the basal metabolism in a table here presented.
Unfortunately, the weights given in these statistics include clothes
worn by the individuals. The calculated heat production, however, is in
each case based upon the weight without clothes. The table is computed
from the following values:
Calories per
square meter
Age in years of surface
15 44
20-50 40
55 37
The table may also be used as follows:
To find the metabolism of--
Women between twenty to fifty years, multiply values for man
by 0.93.
Boys of twelve to thirteen years, multiply values for boys of
fifteen years by 1.10.
THE BASAL METABOLISM OF MEN
_Calculated from values of the basal metabolism determined by the
methods of DuBois and applied to a table showing the average weights of
221,819 men of different ages and heights compiled from the statistics
of the medico-actuarial investigation of 1912._
------------+------+------+------+------+------+------+------+------+------
Age. | | | | | | | | |
Heat per | 5 ft.| 5 ft.| 5 ft.| 5 ft.| 5 ft.| 5 ft.| 6 ft.| 6 ft.| 6 ft.
square meter| 0 in.| 2 in.| 4 in.| 6 in.| 8 in.|10 in.| 0 in.| 2 in.| 4 in.
of surface | | | | | | | | |
------------+------+------+------+------+------+------+------+------+------
| Lbs.| Lbs.| Lbs.| Lbs.| Lbs.| Lbs.| Lbs.| Lbs.| Lbs.
| Cals.| Cals.| Cals.| Cals.| Cals.| Cals.| Cals.| Cals.| Cals.
15 years | 107 | 112 | 118 | 126 | 134 | 142 | 152 | 162 | 172
44 calories |{1510}|{1584}|{1658}|{1753}|{1837}|{1922}|{2006}|{2096}|{2186}
| | | | | | | | |
20 years | 117 | 122 | 128 | 136 | 144 | 152 | 161 | 171 | 181
40 calories |{1430}|{1498}|{1565}|{1647}|{1719}|{1796}|{1868}|{1949}|{2035}
| | | | | | | | |
25 years | 122 | 126 | 133 | 141 | 149 | 157 | 167 | 179 | 189
40 calories |{1459}|{1517}|{1594}|{1671}|{1738}|{1820}|{1896}|{1992}|{2083}
| | | | | | | | |
30 years | 126 | 130 | 136 | 144 | 152 | 161 | 172 | 184 | 196
40 calories |{1478}|{1536}|{1604}|{1685}|{1757}|{1839}|{1920}|{2007}|{2112}
| | | | | | | | |
35 years | 128 | 132 | 138 | 146 | 155 | 165 | 176 | 189 | 201
40 calories |{1488}|{1556}|{1613}|{1695}|{1767}|{1853}|{1939}|{2035}|{2136}
| | | | | | | | |
40 years | 131 | 135 | 141 | 149 | 158 | 168 | 180 | 193 | 206
40 calories |{1498}|{1565}|{1623}|{1709}|{1781}|{1863}|{1959}|{2055}|{2160}
| | | | | | | | |
45 years | 133 | 137 | 143 | 151 | 160 | 170 | 182 | 195 | 209
40 calories |{1507}|{1570}|{1632}|{1719}|{1791}|{1872}|{1968}|{2064}|{2169}
| | | | | | | | |
50 years | 134 | 138 | 144 | 152 | 161 | 171 | 183 | 197 | 211
40 calories |{1517}|{1575}|{1642}|{1724}|{1796}|{1881}|{1973}|{2074}|{2184}
| | | | | | | | |
55 years | 135 | 139 | 145 | 153 | 163 | 173 | 184 | 198 | 212
37 calories |{1449}|{1485}|{1548}|{1620}|{1692}|{1773}|{1854}|{1949}|{2052}
------------+------+------+------+------+------+------+------+------+------
The basal metabolism of an average boy of thirteen years of age
weighing 80 pounds and of a height of 4 feet, 10 inches, may be
calculated as 1525 calories per day. This is the same as that of a man
twenty-five years old, weighing 126 pounds and 5 feet, 2 inches tall.
A boy thirteen years old and weighing 156 pounds, his height being 6
feet, 1 inch (there are such cases), would have a basal metabolism of
2300 calories, or larger than that of any grown man given in the
table--larger than a man weighing 211 pounds and 6 feet, 4 inches in
height. I personally know a boy of this age and size. His parents are
said to have sent him to boarding school in order to reduce their food
bills.
It is evident from this discussion that the food requirement of boys
over twelve years old is about the same as that of men. The emaciation
of the children of the poor probably reduces their requirement of food.
It is not generally recognized that the boy needs as much food as his
father. The requirements of girls have not been investigated, but they
probably need as much as their mothers.
These data will give with close scientific precision the _minimal
requirement for energy_ which is necessary for the maintenance of the
bed-ridden.
Ordinary life, however, is not constituted after this fashion. "By the
sweat of thy brow shalt thou eat bread."
From the work of F. G. Benedict one may calculate the increase in the
basal metabolism, as follows:
Increase in
the basal
metabolism
Occupation in per cent.
Sitting 5
Standing, relaxed 10
Standing, hand on a staff 11
Standing, leaning on support 3
Standing, "attention" 14
If one wishes to determine from the basal metabolism table the heat
production of a person who is confined to his room, one should add to
the metabolism of the twenty-four hours the increase above the basal for
those hours of the day during which he is sitting in a chair or
standing.
Passing to a consideration of the subject of mechanical work done by a
man, one finds that it requires about 1.1 calories to transport a pound
of body weight three miles during an hour, and that increasing power
must be generated if the speed is increased above this rate of _maximal
economic velocity_.
These relations are shown below:
Extra calories
per hour required
to move 1 pound
Rate of movement of body
Walking 3 miles per hour 1.1
Walking 5.3 miles per hour 3.6
Running 5.3 miles per hour 3.1
If one wishes to determine the heat production of a man weighing 156
pounds and 5 feet, 7 inches in height, and who is walking or running,
the following calculations can be made:
Rate of travel per hour in miles 3[3] 5.3[3] 5.3[4]
Cals. Cals. Cals.
Metabolism for transporting 156 pounds 172 562 484
Basal metabolism 70 70 70
Add for standing 7 7 7
--- --- ---
249 639 561
[3] Walking.
[4] Running.
If the man's food cost 10 cents a thousand calories, it may be
calculated that he would have to walk over eight miles at a rate of
three miles per hour in order to save money when he pays a 5-cent
carfare. (This, however, does not include the cost of shoe leather.)
The carrying of a load of 44 pounds is done at the same expenditure of
energy as the carrying of one's own body weight when the rate is three
miles an hour, so the soldier's equipment would call for the added
expenditure of 48 calories (44 × 1.1), making his total hourly
expenditure of energy nearly 300 calories (249 + 44) during a hike on a
level road. His daily requirement for energy might be:
Calories
Sleeping 8 hours at 70 calories per hour 560
Resting in camp 6 hours at 77 calories per hour 462
Hike of 30 miles, 10 hours at 300 calories per hour 3000
----
4022
This would be the heat production of a soldier on a day of a "forced
march." The ordinary day's march is only fifteen miles.
This assumes a level road. If, however, there are hills to climb and
the body weight and the pack are lifted 1000 feet during the hike, this
is done at the additional expense of approximately 0.96 calory of energy
per pound of weight lifted. If the man weighed 156 pounds and the pack
44 pounds, the additional fuel requirement would be 192 calories (200 ×
0.96). The total energy requirement for this kind of a hike would have
been 4200 calories. Walking down hill is accomplished at an expenditure
of slightly less energy than walking on the level, but this factor need
not concern one.
Supposing, however, this individual were running, lightly clad, on a
level road in a race for a distance of 40 miles at the rate of 5.3 miles
per hour, he would complete the distance in seven hours and thirty-three
minutes, which is a reasonable record. His metabolism might thus be
calculated:
Calories
Sleeping 10 hours at 70 calories per hour 700
Resting 6 hours, 23 minutes, at 77 calories per hour 497
Running 7 hours, 33 minutes, at 561 calories per hour 4236
----
5433
It is a matter of record that a man has run between Milwaukee and
Chicago, a distance of 80 miles, in about fifteen hours. Such an amount
of work would have required over 9000 calories for the day.
These calculations are all based upon experimental results obtained in
various laboratories in different parts of the world and can be accepted
as being free from any gross error.
It is evident that the energy requirement is proportional to the amount
of mechanical energy expended.
One may turn now to the fuel needs in terms of calories in certain
industrial pursuits. According to Becker and Hämäläinen, the quantity of
extra metabolism per hour required in various pursuits is as follows:
Extra calories of
metabolism per
hour due to
occupation
Occupations of women:
Seamstress 6
Typist[5] 24
Seamstress using sewing machine 24-57
Bookbinder 38-63
Housemaid 81-157
Washerwoman 124-214
Occupations of men:
Tailor 44
Bookbinder 81
Shoemaker 90
Carpenter 116-164
Metal worker 141
Painter (of furniture) 145
Stonemason 300
Man sawing wood 378
[5] Observation of Carpenter.
To use this table one may seek the basal metabolism of the individual,
add 10 per cent. for sixteen hours of wakefulness when the person is
sitting or standing, and then multiply the factors in the last table by
the numbers of hours of work. For example, if one takes the individual
weighing 156 pounds, one obtains the following requirements of energy if
his business were that of a tailor and he worked eight hours a day:
Calories
Sleeping 8 hours at 70 calories per hour 560
Awake 16 hours at 77 calories per hour 1232
Add for work as tailor 8 hours at 44 calories 352
----
2144
After this fashion one might calculate his food requirements had he
followed occupations other than that of tailor:
Calories of
metabolism
Occupation per day
Bookbinder 2440
Shoemaker 2510
Carpenter 3100
Metal worker 2900
Painter 2950
Stonemason 4200
Man sawing wood 4800
These figures make no allowance for walking to or from the place of
employment.
The data here given are inadequate to cover the industrial situation,
but they show clearly that heavy work cannot be accomplished without a
sufficient amount of food-fuel.
The food-fuel with which to accomplish work is necessary not only for
the soldier, but for the workman behind the line, and it should be
adequate in quantity, satisfactory in quality, and not exorbitant in
cost.
In virtue of the world-wide scarcity of food, the work of the individual
should be worthy of the food which he eats.
Tables showing the cost of various wholesome food-stuffs about July 1,
1917, are here reproduced for the benefit of the reader. The tables were
prepared by Dr. F. C. Gephart and issued by the Department of Health of
the City of New York in a leaflet edited by Doctors Holt, La Fetra,
Pisek, and Lusk on the subject of food for children. If the world is
seeking after energy in the form of food-fuel, the world is rightly
entitled to understand the value of its purchases. It must be clearly
understood that people are always destined to look with hopeful
anticipation toward the enjoyment of a meal. They will instinctively
"eat calories" just as they instinctively "eat pounds." They _buy
pounds_ of food, and they could buy more intelligently if they knew the
energy value of what they buy.
Cost of 1000 Price per
calories, pound,
cents cents
TABLE 1--_Cost of Fats._
Cottonseed oil 7.3 31
Oleomargarine 8.5 30
Peanut butter 8.8 25
Butter 11.9 43
Olive oil 12.1 51
Bacon 13.8 37
Bacon, sliced, in jars 23.8 65
Cream (extra heavy, 40 per cent.) 37.7 65 (1 pint)
TABLE 2--_Cost of Cereals._
Cornmeal, in bulk 3.6 6
Hominy, in bulk 3.6 6
Broken rice, in bulk 3.7 6
Oatmeal, in bulk 3.8 7
Samp, in bulk 4.2 7
Quaker Oats, in package 4.4 8
Macaroni, in package 4.5 8
Wheat flour, in bulk 4.6 8
Malt breakfast food, in package 4.8 8
Pettijohn, in package 5.3 9
Cream of Wheat, in package 5.7 10
Farina, in package 5.9 10
Cracked wheat, in bulk 5.9 10
Pearl barley, in package 6.0 10
Barley flour, in bulk 6.1 10
Whole rice, in bulk 6.1 10
Wheatena, in package 8.1 14
TABLE 3--_Cost of Ready-to-serve Cereals._
Shredded Wheat Biscuit 7.8 13
Grape-nuts 8.6 15
Force 9.4 16
Corn Flakes 11.7 20
Puffed rice 23.5 38
TABLE 4--_Cost of Vegetables._
White potatoes 12.9 4.0
Turnips 20.0 2.5
New beets 27.6 5.0
Onions 29.3 6.0
Spinach 30.0 3.3
Green peas 39.2 10.0
Lima beans 39.2 10.0
Cauliflower 42.9 6.0
Carrots 50.0 8.0
String-beans 55.6 10.0
Squash 76.2 8.0
Lettuce 89.4 7.0
Celery 214.0 15.0
TABLE 5--_Cost of Breadstuffs._
Ginger-snaps 6.3 12.0
Graham bread 8.2 10.3
White bread 8.5 10.3
Rye bread 8.7 10.3
Graham crackers 9.2 18.0
Soda crackers 9.4 18.0
French rolls 10.8 14.0
Uneeda Biscuit 12.4 24.0
TABLE 6--_Cost of Proteins._
Milk (Grade A) 20.0 13.0 (1 quart)
Roast beef (rib) 23.4 26.0
Buttermilk 26.5 9.0 (1 quart)
Lamb chops (loin) 32.7 43.0
Lamb chops (rib) 34.9 38.0
Young codfish (fresh) 38.6 12.0
Chicken (roasting) 41.3 32.0
Eggs 44.7 45.0 (1 dozen)
Beefsteak (round) 50.4 34.0
TABLE 7--_Cost of Fruit._
Fresh (in season):
Bananas 23.0 6
Apples 23.7 5
Oranges 65.0 10
Dried:
Prunes 8.4 10
Apples 11.1 15
Peaches 12.5 15
Apricots 15.5 20
TABLE 8--_Cost of Syrup._
Cane sugar 4.5 8
Karo corn syrup 5.7 8
A British scientific commission has reported to Parliament that if the
workman be undernourished he may, by grit and pluck, continue his labor
for a certain time, but in the end his work is sure to fail. It makes no
difference what the nutritive condition of the person is, if a certain
job involving muscular effort is to be done it always requires a
definite amount of extra food-fuel to do it. Rubner, the greatest German
authority on nutrition, excited grossly inappropriate hilarity in the
comic press of his country by showing that a poor woman who waited
several hours in line in order to receive the dole of fat allowed her by
the government actually consumed more of her own body fat in the effort
of standing during those hours than she obtained in the fat given her
when her turn to receive it came at last.
A method by which food-fuel can readily be saved with benefit to the
nation and to the individual is for the overfat to reduce their weight.
This has been done with drastic severity in Germany. I have heard from
unquestioned sources how a man who had weighed 240 pounds lost 90 pounds
since the war began; how a corpulent professor at Breslau lost greatly
in weight, but during the second summer of the war regained his former
corpulence during a sojourn in the Bavarian Tyrol, a joy not now
tolerated; and how an American woman lost 40 pounds in weight last
winter in Dresden. There is every reason why a man who is overweight at
the age of fifty should reduce his weight until he reaches the weight he
was when he was thirty-five. According to Dr. Fisk he is a better
insurance risk if after thirty-five he is under the weight which is the
average for those of his years. Reduction in weight reduces the basal
requirement for food, and reduces the amount of fuel needed for moving
the body in walking. The most extreme illustration of the effect of
emaciation upon the food requirement is afforded by a woman who after
losing nearly half of her body weight was found to need only 40 per
cent. of the food-fuel formerly required. This represented a state not
far from the border line of death from starvation, but it indicates how
a community may long support itself on restricted rations. It must be
strictly borne in mind, however, that if any external muscular work is
to be accomplished it can only be effected at the expense of a given
added quantity of food-fuel, whether the person be fat or thin.
It is not at all difficult to reduce the body weight. Suppose a
clergyman or a physician requires 2500 calories daily in the
accomplishment of his work and takes 2580 calories per day instead. The
additional 80 calories is the equivalent of a butter ball weighing a
third of an ounce, or an ounce of bread or half a glass of milk. It
would seem to be the height of absurdity to object to such a trifle. But
if this excess in food intake be continued for a year, the person will
gain nine pounds and at the end of ten years ninety pounds. Such a
person would find that he required a constantly increasing amount of
food in order to transport his constantly increasing weight. In
instances of this sort a motto may be applied which I heard the last
time I was in Washington: "Do not stuff your husband, husband your
stuff."
Now it is evident that, if instead of taking more than the required
amount of food a little less be taken than is needed, the balance of
food-fuel must be obtained from the reserves of the body's own supply of
fat. By cutting down the quantity of fat taken, or by eliminating a
glass of beer or a drink of whiskey, and not compensating for the loss
of these by adding other food stuffs, the weight may be gradually
reduced. The amusing little book entitled "Eat and Grow Thin" recommends
a high protein and almost carbohydrate-free diet for the accomplishment
of this purpose, but its advice has made so many of my friends so
utterly miserable that I am sure in the end it will counteract its own
message.
The work of the world is accomplished in largest part by the oxidation
of carbohydrates, that is to say, of sugars and starches. Bread, corn,
rice, macaroni, cane-sugar, these are _par excellence_ the food-fuels of
the human machine. In the dinner-pail of the laborer they testify as to
the source of his power. They are convertible into glucose in the body,
which glucose gives power to the human machine. They may be used for the
production of work without of themselves increasing the heat production
of the worker, as happens after meat ingestion. (See p. 18.) Fat also
may be used as a source of energy, but unless carbohydrate is present a
person can not work up to his fullest capacity.
Cane-sugar is a valuable condiment, and when taken in small quantities
every half hour, may delay the onset of fatigue. It is more largely used
in the United States than in other countries in the world. As a
substitute, glucose may be used. This is found in grapes and in raisins
and it is also produced in large quantities by the hydrolysis of starch
and sold under the commercial name of corn syrup or Karo. This substance
is entirely wholesome and may be freely employed in the place of sugar,
which is scarce.
As to the use of alcoholic beverages, the question resolves itself into
several factors. Alcohol gives a sham sensation of added force and in
reality decreases the ability to do work. Alcohol is the greatest cause
of misery in the world, and as Cushny has put it, if alcohol had been a
new synthetic drug introduced from Germany, its importation would long
since have been forbidden. On the other hand, good beer makes poor food
taste well. It also frequently leads to overeating. The cure for bad
food is to have our daughters taught how to cook a decent meal. After
that we can talk about prohibition.
In some parts of the world whole nations are starving to death. In most
countries of the world people are short of food. In America we have more
food than in any other land, and we must, therefore, be careful in our
abundance, saving it to the utmost, while, at the same time, conserving
the safety of our own people.
III
RULES OF SAVING AND SAFETY
1. Let no family (of five persons) buy meat until it has bought three
quarts of milk, the cheapest protein food. Farmers should be urged to
meet this demand.
2. Save the cream and butter and eat oleomargarine and vegetable oils.
Olive oil or cottonseed oil, taken with cabbage, lettuce, or beet-tops,
is excellent food, in many ways imitating milk.
3. Eat meat sparingly, rich and poor, laborer and indolent alike. Meat
does not increase the muscular power. When a person is exposed to great
cold, meat may be recommended, for it warms the body more than any other
food. In hot weather, for the same reason, it causes increased sweating
and discomfort. In general, twice as much meat is used as is now right,
for to produce meat requires much fodder which might better be used for
milk production.
4. Eat corn bread. It saved our New England ancestors from starvation.
If we eat it we can send wheat to France. Eat oatmeal.
5. Drink no alcohol. In many families 10 per cent. of the income is
spent for drink, or a sum which, if spent for real food, would greatly
improve the welfare of the family.
6. Eat corn syrup on cereals. It will save the sugar. Eat raisins in
rice pudding, for raisins contain sugar.
7. Eat fresh fish.
8. Eat fruit and vegetables.
Since the total energy for the maintenance of our bodies can be measured
in calories, and since this energy serves for the maintenance of the
nations of the world, is it not surprising how little even educated
people know about the subject?
INDEX
Alcoholic beverages, 41
Appetite, 23, 35, 41
Balanced ration, biological analysis of, 9
Basal metabolism, definition of, 24
of boys, 26, 29
of men, 26
table, 28
of women, 27
Butter, 8
Cabbage, 7
Calorie, definition, 24
Calories, cost of, 35
Calorimeter, 24
Cane sugar, 41
Carbohydrates and muscular work, 40
Chittenden, 16
Corn and pellagra, 10
in Italy, 7
quantity available, 11
reasons for using, 10
syrup, 41
Cream, use of, 11
Diet, a balanced, 7
a proper, 23
Italian, 7
of purified food-stuffs, 9
DuBois, measurement of surface area, 26
Economy in diet, 8
Emaciation, metabolism in, 39
Energy of sun, relation of life to, 23
Fasting, metabolism in, 25
Foods, cost of, 35
Graham bread, 16
Graham, Sylvester, 16
Green leaves in diet, 8
Heat production in man, 24
Hindhede's dietary, 14
Life, nature of, 25
Meat and muscle work, 18
desirability of, 15
economic production of, 19, 20
in hot weather, 18, 43
restricted diet of, in America, 18, 20
in England, 19
in Germany, 18
specific dynamic action of, 17
Meatless dietary, 14
Men, metabolism of, 27
Metabolism, definition of, 26
in emaciation, 39
in fasting, 25
Milk, cost of, 13
economic production of, 19, 20
food value, 8, 13, 14
in pellagra, 10
Mineral salts, 8, 23, 25
Muscle work, 25, 30
and carbohydrates, 40
and diet, 17
and fasting, 17
and protein, 18
and undernutrition, 38, 39
Occupation and metabolism, carrying a load, 31
climbing, 32
industrial, 33
posture, 30
running, 30-32
walking, 30
Oleomargarine, 12
Olive oil, 8
Overfat people, 38
Oxidation of food-stuffs, 24
Peanut butter, 12
Pellagra, 9
Pork, economic production of, 19, 20, 21
Potato diet, 15
Rules of saving and safety, 43
Substitution of foods, 43
historical, 11
Summary, 43
Surface area and heat production, 26
Undernutrition, 38
and labor, 38
Vegetable oils, use of, 12
Vegetarianism, 16
Vitamins, 8, 23
Weight, reduction of, 39
Women, metabolism of, 27
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