VI CONTENTS. 



PAGE 



General description of the respiration apparatus Continued. 



Potash-lime cans 60 



Balance for weighing absorbers 61 



Purification of the air-current with sodium bicarbonate 63 



Valves 63 



Couplings 64 



Absorber table 65 



Oxygen supply 67 



Automatic control of oxygen supply 69 



Tension equalizer 71 



Barometer 72 



Analysis of residual air 73 



Gas-meter 75 



Calculation of results 76 



Analysis of oxygen 76 



Advantage of a constant-temperature room and temperature control 77 



Variations in the apparent volume of air 77 



Changes in volume due to the absorption of water and carbon dioxide 78 



Respiratory loss 78 



Calculation of the volume of air residual in the chamber 79 



Residual analyses 80 



Calculation from residual analyses 80 



Influence of fluctuations in temperature and pressure on the apparent 



volume of air in the system 83 



Influence of fluctuations in the amounts of carbon dioxide and water- 

 vapor upon residual oxygen 83 



Control of residual analyses 84 



Nitrogen admitted with the oxygen 84 



Rejection of air 85 



Interchange of air in the food aperture 85 



Use of the residual blank in the calculations 86 



Abbreviated method of computation of oxygen admitted to the chamber 



for use during short experiments 88 



Criticism of the method of calculating the volume of oxygen 89 



Calculation of total output of carbon dioxide and water-vapor and oxygen 



absorption 91 



Control experiments with burning alcohol 91 



Balance for weighing subject 93 



Pulse rate and respiration rate 95 



Routine of an experiment with man 96 



Preparation of subject 96 



Sealing in the cover 97 



Routine at observer's table 97 



Manipulation of the water-meter 98 



Absorber table 99 



Supplemental apparatus 100 



