54 



Table 26.- 



-Coefficients of digestibility of nutrients of different grouiis of food 

 materials and of total nutrients of mixed diet. 



Carbohy- 

 drates. 



Animal foods 



Cereals 



Legumes, dried (beans and peas)_ 



Sugars and starches 



Vegetables 



Fruits.. _ 



Vegetable foods _ 



Total food 



Per cent. 

 '.IS 

 98 

 97 

 98 

 95 

 90 

 97 

 97 



On the assumption tliat tlie nntrieiits of tlie different classes of 

 food materials in the diet eaten during the experiment would be 

 digested in the proportions given in the above table, tlie digestibility 

 of each nutrient in the total diet would be for each exj^eriment as 

 given in the columns headed " Calculated" in the following table, 

 while the results actually found are given in the columns headed 

 "Determined." 



Table 27. — Comparison of coeffieients of digestibility as found by actual experi- 

 ment and as calculated by factors in experiments Nos. 4(j3-40S. 



In every case but one the agreement between the calculated coeffi- 

 cients and those actually found is reasonably close, and would indi- 

 cate, as exjiressed above, that these men, under the experimental 

 conditions already described, digested the nutrients of their diet in 

 about the same proportions as have been found for the average indi- 

 vidual on an ordinaiy mixed diet. The exception noted is that of the 

 digestion of protein by the subject in experiment No. 4(34, with wliom 

 the result actually found was noticeablj' lower than tliat calculated 

 by average coefficients. This discrepancy between the results as cal- 

 culated and as actuall}'' found in the case of this man would suggest 

 that he digested either animal i3rotein, or perhaps both animal and 

 vegetable i3rotein, less thoroughly than has been found in the average 

 with other individuals. The reason why the deficiency would seem 

 rather to be with the animal protein is found in the fact that the pro- 



