— 18 



small loaf of bread, a pound of steak, and foiir oiinces of biittor per day. 

 This is a meager dietary, thoiigh seemingly like the one just called cor- 

 rect; but the first diet had potatoes in addition, and probably more 

 bread. The composition of his diet is as follows: 



The subsistence dietary, No. 13 in Table I, would consist of about 18 

 ounces of bread and 6 of meat, as follows: 



Protein. 



Fat. 



Carbo- j Fuel 

 hydrates. Value. 



The army ration of the United States is a good illustration of the fact 

 that although several of the foods seeni to have the same composition 

 they cannot be used as Substitutes for each other. For instance, the meat 

 ration consists of 22 ounces salt beef, or 12 of salt pork or bacon, or 12 

 of corned beef (fresh.or canned), or 20 of fresh beef, or 14 of dried lish, or 

 18 of pickled fish. The caloric value of these meats vary greatly, that ^ 

 of 20 ounces fresh beef being 1,700 with 8.16 ounces of p^otein, while 12./ > 

 ounces corned beef has only 1,200 calories with about 5.5 ounces of p«)v 

 ^eirtr. The same may be said of the cereal part of the ration, thus prov- 

 ing that these materials connected by " or " are not always equivalents. 



The foUowing is an example of a strictly vegetable diet: 



l^ 



Tliis dietary, wliile fully \\\) to the averago in aniount of food-material, 

 is deficient in protein and fuel value, thus showing that it would be a 

 somewhat diflicult matter to obtain the proper amouni of protein aiul 

 the right caloric value from a strictly vegetable diet. It luust not ))e lost 

 sight of that not only is the })rotein low, but that tlie amount i)resent 

 would not be equal in nutritive value to the same quantity derived from 

 animal foods, owing to the higlier digestion coeflicient of protein i)oss(>ssed 

 liy aiiimal foods. Thelackof iirolciii or iilbuiuinoids nnd f;i( in 1heal)ove 



