vi CONTENTS. 
Page 
§2. The Non-nitrogenous Nutrients...... a Selo of a Vakacarartedeva seats omens 114 
Effects on Proteid Metabolism ............cceeeeeeeeees 114 
The Minimum of Proteids.............0eeeeeeeeves 133 
Effects on Total Metabolism. .............ceceeeceeeeee 144 
Mutual Replacement of Nutrients.............0e00: 148 
Utilization of Excess—Sources of Fat,........--++5 162 
CHAPTER VI. 
Tre InrLvENCcE oF MuscuLaR ExEeRTION UPON METABOLISM.........- 185 
§ 1. General Features of Muscular Activity..............00eeeeee 185 
Muscular Contraction. .......... 0... cee cece eee e eens 185 
Secondary Effects of Muscular Exertion................ 191 
§2. Effects upon Metabolism............ 0... e cece ee eee eee eens 193 
Upon the Proteid Metabolism....................--000 194 
Upon the Carbon Metabolism. ..........ecceseeeeseeces 209 
PART II. 
THE INCOME AND EXPENDITURE OF ENERGY. 
CHAPTER VII. 
FORCE AND ENERGY..... 0.0.0.0. c cece ee eeee iaineGie! elas Wis sim ebiosianere 226 
CHAPTER VIII. 
Meruops or INVESTIGATION cree ene e cece eee ee enna eeeeeenenee 234 
CHAPTER IX. 
Tue ConsERVATION oF ENERGY IN THE ANIMAL Bopy............0. 258 
CHAPTER X. 
Tue Foop as a Source or ENERGY—METABOLIZABLE ENERGY........ 269 
§ 1. Experiments on Carnivora.............cccc cece cee eeeeees 272 
§ 2, Experiments on Man............. 0 ccc cece ce eececeeereees 277 
§ 3. Experiments on Herbivora.................. Srograanrelpegrnats 281 
Metabolizable Energy of Organic Matter................ 284 
Total Organic Matter...............ccccceeeceeee 285 
Digestible Organic Matter................000000005 297 
Energy of Digestible Nutrients...............0ccceceee 302 
Gross Energy............ dabapses toaicecap ene teed bu ton giles deriosans 302 
Metabolizable Energy.........cccceeeeecccccces .. 310 
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