COMPOSITION OF PURE COCOAS. 989 
Approximate average composition of pure cocoas, partially deprived of fat. 
Nutritive constituents. Per cent. 
eS SS OS ein Sie ct 2 Pe ee 20 
ea re wd ie i a i ee ee 30 
Carbohydrates (‘nitrogen-free extract.”’ inclnding starch, etc.) --.......--.-....------------ 30 
It must be remembered, however, that only about o1 e-half of these 
nitrogenous substances are digestible protein, and the carbohydrate 
figure given includes several substances of doubtful nutritive value. 
Amount of nutritive materials required per day by a man doing moderate manual labor! 
Authority. 
Nutrients. 
Voit. | Atwater. 
Grams. Grams. 
Ne ee a an oi eat aad wine onan e~ o'2 Soh ae 118 125 
_ lo Ee on ice ot ee Re Ea es oe eee mee 36 125 
Carbohydrates... -....-- agi icctes tes Shets teste a= eet oS ee 500 | 450 
| 
1W.0O. Atwater and Charles D. Woods, Fourth Annual Report of the Storrs School Agricultural 
Experiment Station, Storrs, Conn., 1891. 
The amount of cocoa used for the preparation of a cup of the beverage 
is generally less than 2.5 grams. From these data, the weights of the 
principal nutrients in a cup of cocoa and the equivalent parts of an 
average daily ration, given in the following table, were calculated: 
Nutrients in a cup of cocoa, made from 2.5 grams of material. 
. | Part of an 
Nutrients. eee average 
= ** daily ration. 
| 
OL 2 sesact SE Pa ee aoe aes Se Ree ee en ee 0.5) si, to zl; 
a ee on te ew es SS ewe 06) Ate 
pemenydrates <= 2-2... 22222... ee ee Sete he eae a Ne ee 0.6] 53; to -3; 
| 
In these calculations the variable additions of milk and sugar are 
disregarded. 
The results of these investigations emphasize in many ways the many 
pleas that have been made for the establishment of standards of purity, 
strength, and quality for foods—for some certain means of enabling 
the public to know the strength, quality, and degree of purity of the 
food materials on the markets. The question of economy alone is suf: 
ficiently important to justify serious consideration of this need, for no 
question can be of more importance to a great part of our nation than 
questions of economy in food, drink, and clothing. 
