156 



Metabolism of Healthy Max. 



results are taken from the extensive article by Magnus-Levy and Falk. 1 In addi- 

 tion to the data in the original table, we have for purposes of comparison com- 

 puted the results on the basis of per square meter of body-surface per minute. 



Table 64. Gas exchange per minute by adults, as determined with the 



Zuntz-Geppert apparatus. 



Hanriot and Eichet 2 made a number of experiments on resting man, em- 

 ploying a new method for determining the respiratory exchange which involved 

 the use of 3 gas-meters for measuring, first, the volume of the air inspired; 

 second, the volume of the air expired ; and third, the volume of the air expired 

 after absorbing the carbon dioxide. As a result of their experiments, they 

 conclude that an adult man in a state of fasting produces per kilogram of 

 body-weight per hour 0.5 gram of carbon dioxide, or 4.24 c. c. per kilogram 

 per minute, and absorbs 0.45 gram of oxygen per kilogram of body-weight per 

 hour, or 5.25 c. c. per kilogram per minute. During digestion, there is 0.6 

 gram of carbon dioxide per kilogram of body-weight per hour, or 5.09 c. c. 

 per kilogram per minute, and 0.5 gram of oxygen per kilogram per hour, or 

 5.84 c. c. per kilogram per minute. 



Using the little-known Pashutin respiration apparatus in St. Petersburg, 

 Sadovyen 3 in 1888 made a number of experiments on healthy man in which 

 the carbon-dioxide production was determined for the greater part of 24 hours. 

 On one day with food, the output of carbon dioxide of a man weighing 79 

 kilos was 946 grams, when calculated to the basis of 24 hours. In a 2-day 



1 Magnus-Levy and Falk, Archiv f. Anat. u. Physiol., Physiol. Abth., Supp. Bd., 

 1899, p. 314. 



2 Hanriot and Richet, Compt. rend., 1888, 106, p. 496. 



* Sadovyen, Publications of the Russian Society of General Hygiene, St. Peters- 

 burg, 1887-1888, 12, p. 13. 



