354 



MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



EXPERIMENTS NOS. 29-31 — WORK. NO. 30 WITH ALCOHOL DIET. 



Subject. — J. F. S., who .served as the subject of the previous series of rest experiments Nos. 

 26-28. His weight with underclothing was about 64.5 kilograms (142 pounds). 



Occupation during experiment. — Work, 8 hours a day, upon a stationary bicycle arranged as 

 an ergometer, as described on page 237. 



Duration. — This experiment was the second of a series of 3, each of which continued 3 days. 

 The preliminary period continued 4 days, beginning with breakfast March 12, 1900. On the 

 evening of the fourth day, March 15, the subject entered the calorimeter. The first of the 3 

 series of experiments, No. 29, began at 7 a. m. March 16, and continued until 7 a. m. March 19, 

 when experiment No. 30 began and continued until 7 a. m. March 22, and in turn was followed 

 by experiment No. 31, which continued until 7 a. m. March 25. The subject therefore remained 

 in the respiration chamber 9 da} T s and 10 nights. 



Dit t. — The object of this series of experiments was to study the relative replacing power of 

 isodynamic quantities of sugar, alcohol, and fat, when the subject was at active exercise. There 

 was a basal ration, as in the previous series, which was practically the same in the 3 experiments, 

 the only difference being that due to slight variations in the composition of the milk consumed. 

 It furnished, approximately, 100 grams of protein and from 2,949 to 2,984 calories of energy per 

 day in the different periods. To this ration was added, in experiment No. 29, 128 grams of cane 

 sugar per day, furnishing 507 calories of energy. In experiment No. 30 the supplemental ration 

 consisted of 72 grams of absolute alcohol per day, furnishing 509 calories of energy. In 

 experiment No. 31 the supplemental ration consisted of 63.5 grams of butter per day, furnishing 

 1 gram of protein and 511 calories of energy. 



To 795.5 grams of water sweetened with 25 grams of sugar were added 79.5 grams of 90.6 

 per cent commercial alcohol containing 72 grams absolute alcohol. This alcohol mixture was 

 taken with and between meals in experiment No. 30 as in previous experiments. The sugar in 

 experiment No. 29 was likewise taken with and between meals, but the butter in experiment No. 

 31 was consumed with the rest of the food in approximate!}" equal portions at breakfast, dinner, 

 and supper. The same amount of water was given in the drink on each day of the experiment 

 and amounted to 1,250 grams per day. In experiment No. 30, 803 grams of this water was 

 furnished by the alcohol mixture. The kinds and quantities of food served at each meal and the 

 quantities of drink at different periods of the day were as follows: 



Diet in metabolism experiments Nos. 99-31. 



FOOD— BASAL EATION. 



"Eaten on parched cereal in experiments Nos. 29 and 31; added to water and alcohol in experiment No. 30. 



FOOD— SUPPLEMENT \L RATION. 



Experiment No. 29, March 16-18. — 128 grama of eane sugar daily in the form of loaf sugar, taken with and between 

 meals. This amount also supplemented the basal ration during the preliminary experiment March 12-15. 



Experiment No. ■.'", March 19-81. — 72 grams absolute alcohol daily. This required 79.5 grams of 90.57 per cent 

 alcohol, which was made up to 900 grams with the addition of 25 grams sugar and the rest water. 



Experiment No. .;/, Man-Ii 22-24. — The additional energy during this experiment was furnished by 63.5 grams 

 butter. 



