Metabolism Experiments Nos. 103-157. 



33 



prior to this period, and hence all the values for this condition are somewhat 

 higher than would be expected. Making this allowance it is rather striking to 

 find that the variation between the values for lying down and for sitting is so 

 small. For purposes of comparison, the change of position from sitting to 

 standing is much more accurately indicated by these experiments, since the 

 digestive processes were probably much the same during both periods and the 

 differences in katabolism can be ascribed solely to differences in body-position. 

 There is a noticeable increase in the total katabolism and the heat production 

 indicates an increase of some 17 per cent during the standing period. 



Table 21. Amounts per hour of carbon dioxide, water, and heat eliminated, oxygen 

 consumed and heat produced Metabolism experiment No. 103. 



METABOLISM EXPERIMENT No. 104. 



Subject, B. F. D., March 3, 1904. (Same subject as in 

 experiment No. 103.) 



Two experiments of one day each, in which this subject rode the bicycle- 

 ergometer, were made on the two days immediately preceding, and this experi- 

 ment was planned for the purpose of obtaining the metabolism during rest for 

 comparison with that during the preceding work periods. This experiment 

 has, therefore, been partially reported in a previous publication 1 in which 

 comparison has been made of the heat output during rest and during muscular 

 work. 



The subject entered the calorimeter chamber at about 6 a. m. and the experi- 

 ment was begun at 7 a. m., at which time he was weighed in a chair suspended 

 from the platform scale. The usual program in rest experiments was followed. 

 Four 3-hour periods were run and the subject left the chamber at 7 p. m. Two 

 meals were eaten, the first between 7 and 8 a. m., and the second between 1 and 

 2 p.m. The total food consumed consisted of milk, 1582 grams; bread, 152 

 grams; butter, 26 grams; meat, 257 grams; coffee, 201 grams; sugar, 30 grams; 

 apples, 600 grams. The pulse, as counted by the subject at 7 h 25 m a. m., was 

 53. The sublingual body-temperature at 7 a. m. was 98.8 F. and at 7 p. m., 

 98.8 F. Urine, in two amounts of 163.8 and 636.1 grams, respectively, was 

 voided during the experiment. The measurements of carbon dioxide, oxygen, 

 and heat, are recorded in table 44. 



1 Benedict and Carpenter, U. S. Dept. Agr., Office Exp. Stas. Bui. 208, 1909. 



