51 
METABOLISM EXPERIMENT NO. 21. 
Subject. — A. W. S.. a physicist, who served as the subject of experi- 
ment No. 4. made before the respiration apparatus had been perfected 
as a calorimeter. 8 He was 25 years of ao-e and averaged about 70 
kilograms (154 pounds) in weight. 
Occupation during eosperiment. — Heading, writing, etc.. with as little 
muscular activity as practicable. 
Duration. — Three days, beginning at 7 a. m. February 12, 1899. 
Diet. — The diet consisted of beef, butter, whole milk, bread, parched 
cereal, and sugar, and furnished 97 grams of protein and 2.26i calories 
of energy per day. The kinds and quantities of food served at each 
meal and the quantities of drink at different periods of the day were 
as follows: 
Table 51. — Diet in metabolism experiment No. 21. 
FOOD. 
Food materials. 
Breakfast. Dinner. Supper. Total. 
Beef 
Butter 
Milk, whole.... 
Bread 
Parched cereal . 
Sugar 
Grams. 
Gi 
ams. 
Grams. 
Grams. 
55 
105 
160 
10 
13 
30 
250 
175 
325 
750 
55 
100 
155 
310 
30 
30 
45 
45 
DRINK. 
Time. 
Water. 
Time. 
Water. 
Breakfast . . . 
10.00 a. m ... 
Grams. 
300 
1 200 
Supper '. 
10.30 p. m 
Total for dav 
Grams. 
300 
200 
; 300 
200 
Dinner 
1. 500 
3.30 
The general routine of the experiment is indicated in the following 
schedule. The statistics of the diary kept by the subject are sum- 
marized in Table 53. below: 
Table 52. — Daily programme — Metabolism experiment No. 21. 
7.00 a. m 
7.45 a.m 
1.00 p. m 
Rise, pass urine, weigh self 1.15 p. m 
stripped and dressed, weigh 6.00 p. m 
absorbers. 7.00 p. m 
Breakfast, drink 200 grams 10.30 p.m... 
water. 
Pass urine. 
. . Dinner. 
. . supper. 
. . Pass urine. 
. . Pass urine, weigh self stripped, 
take cap off food aperture, 
retire. 
U. S. Dept. Agr., Office of Experiment Stations Bui. 44, p. 51. 
