BASAL METABOLISM. 63 



second day may in large part be accounted for by the difference in the 

 muscular activity of the two days, especially during the wakeful night, 

 and hence the results are not comparable. 



All of the food experiments thus far considered were made with a 

 mixed diet. As it seemed desirable to study specific food substances, 

 an experiment was made with one subject, A. H. M., in which an ex- 

 clusively fat diet was given. The basal values for comparison were 

 drawn from a 2-day fasting experiment with the same subject, carried 

 out December 3 to 5, 1906, which was a duplicate of an experiment 

 made on November 21 to 23, 1905. This repetition was due to the 

 fact that, in a complete survey of the figures obtained with the subjects 

 of the short fasts at Wesleyan University, it was found that A. H. M. 

 gave indications of having stored glycogen during the November experi- 

 ment, and it was thus desirable to find if this subject consistently gave 

 abnormal values for katabolized glycogen. The results of the first 

 fasting experiment have been given in full in an earlier publication, 1 

 but the second experiment was made over a year afterward and too 

 late to include in that report. As the results for the fasting experiment 

 December 3 to 5, 1906, have not heretofore been published, the data 

 are given in considerable detail in this publication. 2 



The routine of this later experiment was but little modified from that 

 of the experiment of November 21 to 23, the records of the body 

 activity being substantially the same as in the earlier experiment. 

 The body-weight without clothing at 7 o'clock each morning was 65.8 

 kilograms, 64.6 kilograms, and 63.4 kilograms for the 3 days, respec- 

 tively, indicating the usual somewhat rapid loss in weight during the 

 first few days of fasting. The records of the pulse rate, respiration 

 rate, strength tests, and body-temperature did not vary appreciably 

 from the values obtained in the earlier experiments with this subject 

 and with others. On the first fasting day the subject drank 114.7 

 grams of water and the weight of urine was 526.8 grams; on the second 

 day he drank 186.3 grams of water and the weight of urine was 569.1 

 grams. The carbon-dioxide production, oxygen consumption, and 

 water vaporization were determined as usual in 2-hour periods through- 

 out the entire experiment; the nitrogen in the urine was also deter- 

 mined. From these values the complete metabolism was obtained. 

 The data for the total carbon-dioxide production, oxygen consumption, 

 and heat production, are given in table 14 (see p. 64) ; those obtained 

 from the analysis of the urine are given in table 15. The subdivision 

 of the income and outgo in terms of elements is shown in table 16, 

 while the elements and materials katabolized, which have been com- 

 puted in accordance with the usual method, 3 are recorded in table 17. 



Benedict, Carnegie Inst. Wash. Pub. No. 77, 1907, p. 222 et seq. 

 2 See, also, statistics for the fasting days Dec. 3 to 5, 1906, on p. 251. 

 3 Benedict, Carnegie Inst. Wash. Pub. No. 77, 1907, p. 37. 



