TECHNIQUE FOE METABOLISM DURING WORK. 



119 



^ 2.54 equals percentage of total outgoing air actually passing through one set of the absorption system. 



* Periods from 1''.02™ to 3^.02™ a. m. selected as minimum periods. The average of these is 292 gms. 

 CO2 per hour. Total bojdy-surface of squad equals 21.8 square meters. Assumihg 3.025 

 calories as heat equivalent per gram of CO2 at a respiratory quotient 0.81, the heat per 

 square meter would be found by the following calculation: 



292X3.025-7-21.8 =40.5 calories per square meter per hour. 



ARRANGEMENTS FOR SLEEPING. 



Night experiments alone were made in our use of this apparatus 

 in the diet research. Twelve beds were provided in 3 sections of 4 

 beds each, as shown in figure 5, page 92. Good springs with suitable 

 bedding made comfortable sleeping quarters. Glass jars for night urine 

 were hung in wire frames at the foot of each bed. 



TECHNIQUE FOR DETERMINING EFFECT OF MUSCULAR WORK. 



The men in Squads A and B were all engaged in various forms of 

 muscular activity, ranging from the severe exercise of leading gymna- 

 sium classes for several hours a day to that of the activity necessary for 

 moving about the campus from building to building. Even our most 

 inactive man showed a considerable amount of muscular activity 

 according to his pedometer and physical activity records. It was 

 important, therefore, to determine the effect of the reduced diet on 

 muscular activity and the physiological phenomena accompanying it. 



MEASUREMENT OF WORK OF BICYCLE RIDING. 



For this purpose we fortunately obtained the cooperation of Pro- 

 fessor A. G. Johnson, of the faculty of the International Young Men's 

 Christian Association College. As a part of an extended study upon 

 the influence of muscular activity upon the heart rate, which had been 



