60 VITALITY AND EFFICIENCY WITH RESTRICTED DIET. 



Sunday: 



5 a. m. Respiration experiment ended. 

 S'^SO"' a. m. Cover taken off group chamber. 



6 a. m. Routine for each subject as follows: Rectal temperature and 



pulse-rate determined by observer with subject lying; subject then 

 rose, emptied bladder, was weighed nude, dressed, and received 

 standard laboratory breakfast. 

 6*'30'" to 9 a. m. Individual psychological measurements given to subjects, 

 three men at a time, in 25-minute periods. Men then free for the 

 rest of the day. 

 On Jan. 6 and 28 for Squad B and Feb. 3 for Squad A, the program for 

 Sunday morning was changed to include experiments on the treadmill and 

 portable respiration apparatus. On these dates the Sunday morning pro- 

 gram was as follows : 

 3^50" a. m. Respiration experiment in group chamber ended. 

 4 a. m. Cover taken off group chamber. 



4^15'° a. m. Rectal temperature and pulse-rate measured as before, also 

 bladder emptied ; first man weighed nude on second floor of Labora- 

 tory; he then dressed, was given a glass of water to drink, and went 

 to third floor of Laboratory for experiments. Same routine fol- 

 lowed for other men in turn. 

 4*^25°' a. m. to 1 p. m. Standing experiments with portable respiration 

 apparatus, and walking experiments with treadmill apparatus; men 

 called in turn at intervals of 20 to 30 minutes. 

 Routine of experiment with portable respiration apparatus: Two experimental 

 periods, each 12 to 15 minutes long; pulse and respiration rates taken during 

 experiment; blood pressure taken at end of experiment. 



Routine of treadmill experiment:^ Electrodes adjusted and pulse-rate taken 

 in hall outside of treadmill room; pulse-rate, sitting in treadmill room; pulse- 

 rate, standing on treadmill ; pulse-rate, transition standing to walking. Prelim- 

 inary period: 4 minutes walking on treadmill, with cover off of chamber 2 3^^ 

 minutes. Main period: Walking on treadmill, with cover on chamber, 20 

 minutes; electrocardiograms taken and approximate measurement of respira- 

 tion rate made during 6th, 12th, and 24th minutes of walking. Visual 

 counts of deflections of galvanometer each minute made during prehminary 

 period and main period of experiment; total distance traveled recorded; 

 total number of steps recorded. After experiment: Pulse-rate taken, transi- 

 tion walking to standing; successive blood-pressure measurements imme- 

 diately at end of walking for period of 2 minutes; subject weighed with 

 electrodes and dressed as on mill; blood pressure and radial pulse, sitting, for 

 10 minutes; strength of grip, but no other psychological measurements. 

 Men dismissed as each finished the last test. 



CHRONOLOGICAL HISTORY OF LOW-DIET RESEARCH. 



To give a general idea of the research and the sequence of events, a 

 chronological history, for both Squads A and B, is included here for 

 the period from September 22, 1917, to May 22, 1918, inclusive. 



September 22. Shipment of apparatus and general suppHes from Boston to 

 Springfield. 



1 Transition pulse-rate, standing to walking, and walking to standing, visual counts of the 

 galvanometer, and blood-pressure measurements immediately at the end of walking not taken 

 with Squad B on January 6. 



