MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



379 



STATISTICAL DETAILS OF DIGESTION EXPERIMENTS. 



As hits already been explained, each metabolism experiment or series of experiments was 

 preceded by a digestion experiment and each metabolism experiment includes a digestion 

 experiment The result* of those digestion experiments in which alcohol formed a part of the 

 diet are detailed herewith. Those of the corresponding experiments without alcohol are given 

 in connection with the description of the latter, as elsewhere published. 8 The results of the 

 digestion experiments with and without alcohol are summarized beyond. 



The weights of the different food materials, as shown in the firstcolumn of Tables CV-CVIII, 

 together with the figures for percentage, composition, and heat of combustion, as shown in 

 Tables I— III above, suffice for the computations of the nutrients and energy in the food and feces. 

 In computing the protein from the nitrogen, the factor 6.25 has been used for all animal foods 

 and 5.70 for the vegetable foods used in the experiments. b The total organic matter as shown 

 in the tables is the sum of the organic constituents — protein, fat. carbohydrates, and alcohol. 



DETAILS OF DIGESTION EXPERIMENT NO. 41. 



This was preliminary to metabolism experiment No. 7, began with breakfast June 3, 1807, and 

 continued 5 days. The diet was the same in kind and practically the same in the relative amounts 

 of the different ingredients as in the following metabolism experiment. The subject was E. O., 

 the laboratory assistant who served in a large number of the experiments here recorded. 

 His weight at the beginning of the experiment was not recorded; at the end it was without 

 clothing, tit). 7 kilograms (147 pounds). He was occupied in his usual duties about the laboratory, 

 but did as little muscular work as practicable, in order that the conditions of exercise should not 

 differ greatly from those in the following rest experiment in the respiration apparatus. The 

 results of the experiment are shown in Table CV. 



DETAILS OF DIGESTION EXPERIMENT NO. 42. 



This experiment followed immediately after No. 41 and formed a part of metabolism experi- 

 ment No. 7. It began with breakfast June 8, 1898, and continued 4 days. The subject, E. O., 

 weighed without clothing 06.7 kilograms (147 pounds) at the beginning and 66 kilograms 

 (145? pound-) at the end of the study. The subject had as little muscular activity as was 

 practicable during the experiment. The details are given in Table CVI. 



Table CV. — Details of digestion experiment X". 41 {preliminary to metabolism experiment No. 7). 



Si i page 241. 

 'See discussion of nitrogen factor for protein. ATWATEitand Bryant, Rept. Storrs (Conn, i Expt. Sta., 1899, p. 76. 



