226 



FOOD INGESTION AND ENERGY TRANSFORMATIONS. 



less than 12 per cent, while in one case it rose as high as 35 per cent, 

 the average being 25 per cent. The average time at which the max- 

 imum values occurred was If to If hours after food. The oxygen 

 consumption shows maxima with wide degrees of divergence, these 

 ranging from 3 to 22 per cent, with an average for the 10 experiments 

 of 12 per cent. The average time when this maximum appeared was 

 between 1 and 1| hours after food. The heat production varied from 

 6 to 24 per cent above the basal value, the average being 14 per cent. 

 Like the carbon-dioxide production, this maximum increment occurred 

 on the average between If and If hours after food. We thus have a 

 fairly consistent picture with 100 grams of dextrose of an average 

 maximum increase of 25 per cent in the carbon-dioxide production, 

 12 per cent in the oxygen consumption, and 14 per cent in the heat 

 production, with an average time after food for the appearance of the 

 maximum of If to If hours. 



TABLE 169. Maximum effect of ingestion of dextrose on carbon dioxide, oxygen, and heat in 



respiration experiments. 



'Period from the time when subject finished eating to the end of the last observation, except in 

 cases when the increment of heat ended earlier. See tables 126 to 139 for complete 

 observations. 



2 Sugar taken with juice of one lemon on this day. 



'Sugar taken with juice of one-half lemon on this day. 



4 Same value occurs 11 to 1 3 and 1J to 2 hours after food. 



*In cereal coffee (about 300 c.c. solution). 



'Same value occurs 2 to 21 hours after food. 



