8 BULLETIN 612, U. S. DEPARTMENT OF AGRICULTURE. 



Summary of digestion experiments with mature dasheen in a simple mixed diet. 



Experiment No. 



Subject. 



Protein. 



Fat. 



Carbohy- 

 drates. 



Ash. 



543 



H. R. G... 

 A. J. H... 

 P. K 

 C.J. W... 



Per cent. 

 79.8 

 87.4 

 88.1 

 73.1 



Per cent. 



95. 5 

 95.0 



96. 9 

 95.7 



Per cent. 

 97.2 

 99.4 

 98.5 

 95.6 



Per cent. 

 75.4 



544 



83.7 



545 



83.7 



546 



64.7 









82.1 



95. S 



97.7 











In the experiments with mature dasheens the subjects ate, on an 

 average, 41 grams of protein, 129 grams of fat, and 231 grams of 

 carbohydrates, of which 82.1 per cent, 95.8 per cent, and 97.7 per 

 cent, respectively, were retained in the body. These values, except 

 for protein, agree quite closely with those reported for an ordinary 

 mixed diet, 1 which are, for protein, 92 per cent; for fat, 95 per 

 cent ; and for carbohydrates, 97 per cent. Perhaps the low coefficient 

 of digestibility of the protein obtained may be due to the fact that 

 only 41 grams were taken per man per day ; it has long been recog- 

 nized that the feces contain nitrogen aside from that derived from 

 the diet, and this becomes proportionately larger as the nitrogen 

 intake decreases. The coefficient of digestibility obtained for the 

 carbohydrates of the mature dasheen, 97.7 per cent, would indicate 

 that they are very well assimilated. 



SUMMARY OF ALL EXPERIMENTS. 



The following table summarizes the results of all the experiments 

 2'eported : 



Summary of all digestion experiments with dasheens in a simple mixed diet. 



Experiment No. 



Subject. 



Protein. 



Fat. 



Carbohy- 

 drates. 



Ash. 



513 



A. J. H. . . 



P. K 



H. K. G.. 



A.J. H. . . 



P. K 



C J. w... 



H. R. (I. . 

 A. J. H... 

 P. K 



C.J. w... 



Per cent. 

 6S.5 

 90.7 

 75. 

 79.9 

 85. 2 

 80.0 

 79.8 

 87. 1 

 88.1 

 73.1 



I'i r cent. 

 94.0 

 97.9 



95. 6 

 97.6 



96. 4 

 95.9 

 95. 5 

 95. 

 96.9 

 95.7 



Per cent. 

 96.8 

 98.4 

 97.5 

 96. 1 

 98. 5 

 97.8 

 97.2 

 99.4 

 98. 5 

 95.6 



Per cent. 

 70.1 



514 



90.2 



519. 



78.0 



520... . 



77.4 



521 



522 



82.2 

 78.7 



543 



75.4 



544 



83.7 



545. ... ..... 



83.7 



546 



64.7 











80. 8 



96.1 



97.6 



78.4 









The average amount of food consumed per subject per day in all 

 experiments was 1,733.4 grams, furnishing 1,313.6 grams of water, 

 41.2 grams of protein, 129.4 grams of fat, 230.6 grams of carbohy- 

 drates, and 18.6 grams of ash. 



1 Connecticut Storrs Sta. Rpt. 1901, p. 245. 



