The total increments in the metabolism as a result of the ingestion of dextrose are given in table 174. Considering first only the increments obtained with 100 grams of dextrose, we find that the total increment in carbon-dioxide production ranged from 6.7 to 20.4 grams with an average increment of 12.5 grams. The increase in oxygen consumption ranged from 0.6 to 8.2 grams with an average of 4 grams, while the increment in heat production ranged from 6 to 35 calories with an average of 18 calories. The average length of the period of observation was 4 hours. In a few instances, namely, the experiments with J. C. C, L. E. E., and H. L. H., additional increments of 1 to 5 grams were obtained by further extension of the measurements. With the ingestion of 75 grams of dextrose the carbon-dioxide increment was reasonably constant, varying only from 5.8 to 8.6 grams with an average of 7.8 grams. The increment in the oxygen consumption ranged from 1.6 to 5.1 grams with an average of 3.5 grams, while the incre merit in the heat production ranged from 8 to 19 calories with an average of 14 calories. The total increments found with the different amounts of dextrose are noticeably unlike.

Table 174. - Total Increment Of Carbon Dioxide, Oxygen, And Heat Following Ingestion Of Dextrose In Respiration Experiments

1Period 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. 27.1 grams for 4h44m. 320.8 grams for 5h23m. 418 grams for 4h59m. 511.7 grams for 6h4m.

Levulose

The results obtained in the experiments with levulose are given similar treatment in table 175. The increments for carbon-dioxide production ranged from 9.9 to 23.3 grams with 100 grams of levulose, with an average value of 18.2 grams. Those for oxygen consumption varied from 3 to 8.3 grams, with an average of 5.1 grams, while the total increments for heat production ranged from 12 to 36 calories, averaging 24 calories. The two experiments with 75 grams of levulose are so widely divergent in their results that the data are of doubtful value, but as both show a positive increment for all three factors, they are included in this comparison. The average values for the two experiments are not far from the averages for the larger amount of levulose.

Table 175. - Total Increment Of Carbon Dioxide, Oxygen, And Heat Following Ingestion Of Levulose In Respiration Experiments

1Period 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 140 to 148 for complete observations.

Sucrose

The experiments with 100 grams of sucrose, which are compared in table 176, show total increments in the carbon-dioxide production ranging from 9.8 to 26 grams and averaging 16.1 grams. In the experiment with L. E. E., May 15,1911, approximately 6 grams additional excess carbon dioxide were obtained in the later periods of the experiments. The total increment in oxygen consumption ranged from 3.9 to 7.8 grams, with an average of 5.9 grams, while the total increase in the heat production varied from 15 to 36 calories, averaging 25 calories. In the experiments with 75 grams of sucrose, with but two subjects, the total increment in the carbon-dioxide production varied widely from 4.7 to 20.4 grams, averaging 11.9 grams. The total increment in the oxygen consumption ranged from 1.9 to 5 grams with an average of 3 grams, while the increment in the heat production ranged from 9 to 27 calories, with an average of 15 calories. From these figures it is seen that the smaller amounts of sugar produced a smaller total increment in all three factors, thus corresponding more or less to the decrease in the maximum effects noted for the results obtained with the 100 grams and 75 grams.

Table 176. - Total Increment Of Carbon Dioxide, Oxygen, And Heat Following Ingestion Of Sucrose In Respiration Experiments

1Period 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. 223.9 grams for 5h23m 314.4 grams for 4h9m. 416.5 grams for 6h5m. 522 grams for 5h40m.

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

Lactose

The five experiments with lactose, grouped in table 177, show reasonable uniformity in the excess carbon dioxide produced, this ranging from 10.2 to 16 grams, with an average of 12.1 grams. In one experiment with H. L. H., on June 7, 1911, which included a later 2-hour period, approximately 1 gram additional was excreted. The excess consumption of oxygen ranged from 1.8 to 6.4 grams, with an average of 4.3 grams, while the excess heat production varied from 10 to 22 calories, with an average of 18 calories. No experiments were made with less than 100 grams of lactose.

Table 177. - Total Increment Of Carbon Dioxide, Oxygen, And Heat Following Ingestion Of 100 Grams Lactose In Respiration Experiments

1Period 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 164 to 168 for complete observations. 213.2 trams for 5h31m.