Variations in Metabolism. 



233 



are taken, the lean men will clearly show the highest heat-production per square 

 meter of body-surface. The excretion of carbon dioxide is noticeably lower with 

 the two fat men than with any other group. This is also true with regard to the 

 carbon-dioxide excretion per square meter of body-surface. The oxygen con- 

 sumption is likewise very low for these men, both on the basia of per kilogram 

 per minute, and also on the basis of per square meter of body-surface. The 

 average high values for both the carbon dioxide and oxygen are again exhibited 

 by the two lean men. From this short and admittedly imperfect classification, 

 therefore, it would appear that the lean men exhibited a noticeably higher 

 metabolism than any of the other groups, as is indicated not only by the carbon- 

 dioxide excretion and oxygen consumption, but likewise by the heat production. 



Table 97. Water vaporized, carbon dioxide eliminated, oxygen absorbed, and heat 

 produced by subjects according to physical characteristics and age, during sleep. 



1 These averages have been taken from the general tables for water, carbon dioxide, oxygen, 

 and heat during sleep. 



