INGESTION OF CARBOHYDRATES. 



229 



found after the ingestion of 100 grams, we find a marked decrease, 

 amounting to one- third to one-half of the increment noted in the 100- 

 gram experiments. With all three factors the time at which the maxi- 

 mum effect occurred is similar to that noted with the larger amount, 

 namely, from 45 to 60 minutes after the ingestion of the carbohydrate. 



TABLE 171. .\faximum effect of ingestion of sucrose 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 149 to 163 for complete observations. 

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

 3 Same value occurs 2 to 2j hours after food. 

 4 73 grams sugar taken with juice of one-half lemon on this day. 

 6 In 200 grams coffee. 



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

 "Same value occurs 2j to 2| hours after food. 



LACTOSE. 



Five observations with different subjects were made after the inges- 

 tion of lactose, the amount being 100 grams in all instances. The time 

 of observation averaged 3 h 23 m . (See table 172.) The carbon-dioxide 

 increment ranged from 22 to 42 per cent with an average of 27 per cent, 

 while the oxygen maxima ranged from 4 to 18 per cent with an average 

 of 11 per cent. The greatest increase in heat production ranged from 



