CONTENTS. 



PA 



3 



PAGE 



INTRODUCTION 



CHAPTER I. 



THE PHYSIOLOGICAL SIGNIFICANCE OF THE EXCHANGE OF OXYGEN 



AND CARBON DIOXIDE - 5 



SECTION 



1 . The Carbon Balance of the Organism 5 



2. The Respiratory Quotient 6 



3. The Measurement of Total Catabolism Direct and Indirect 



Calorimetry - - 9 



CHAPTER II. 

 METHODS FOR MEASURING THE RESPIRATORY EXCHANGE - 14 



SECTION 



1. General Principles - - 14 



2. Classification of Methods - . - 20 



3. Closed- Space Respiration Apparatus - 23 



4. Air- Current Respiration Apparatus - 32 



5. Apparatus for Measuring the Pulmonary Gas Exchange - 38 



6. Methods for Studying the Respiratory Exchange of Aquatic . 



Animals - - 47 



CHAPTER III. 



THE EXCHANGE OF NITROGEN, HYDROGEN, METHANE, AMMONIA, AND 



OTHER GASES OF MINOR IMPORTANCE - - 52 



CHAPTER IV. 



THE STANDARD METABOLISM OF THE ORGANISM : DEFINITION AND 



DETERMINATION - 56 



CHAPTER V. 



THE INFLUENCE OF INTERNAL FACTORS UPON THE STANDARD 



METABOLISM - - - 62 



SECTION 



1. The Central Nervous System - - 62 



2. The Thyroid Gland . 63 



3. The Hypophysis - - 64 



4. The Sexual Glands - - 64 



