C X T E X T S 
Page. 
Introduction 7 
The questions studied 7 
General plan of the apparatus and the experiments 9 
Test experiments 
Sampling of the air current for analysis 14 
Experiments with men 15 
Preparation, sampling, and analysis of foods 16 
Determination of nitrates and nitrites in the water of perspiration 18 
Record of body weight, temperature, and pulse rate .' 19 
Measurement of muscular work 20 
Details of the experiments 21 
Metabolism experiment No. 11 21 
Metabolism experiment ]Jo. 13 32 
Metabolism experiment No. 14 40 
Metabolism experiment No. 21 51 
Metabolism experiment X os. 23 and 24 
Metabolism experiment Xo. 25 71 
Metabolism experiment Xos. 26 and 28 80 
Metabolism experiment Xos. 29 and 31 94 
Metabolism experiment Nos. 32 and 34 107 
Summary and results of the experiments 121 
Scope of the investigations 121 
Summary and results of individual experiments 1 25 
Food materials supplied and consumed, and the difference in demand by 
men at rest and at work 128 
Elimination of water 131 
Elimination of carbon dioxid 136 
Elimination of energy 138 
Income and outgo of energy 1 44 
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