44 



Influence of Inanition on Metabolism. 



rections were clue to cold drinking-water. The sum of the corrections for this 

 day is 22.7 calories, or, in other words, 22.7 calories of heat were required to 

 warm the objects to the temperature of the calorimeter chamber, and hence 

 were not measured in the water-current. 



Capacity correction of the calorimeter. Even with the most skillful physical 

 assistants slight fluctuations in the temperature of the calorimeter are unavoid- 

 able, and since the large mass of metal is capable of storing and yielding 

 considerable quantities of heat, the result of these fluctuations must be taken 

 into consideration to determine correctly the total heat elimination for any 

 given period. From a number of tests, which, however, admittedly partake more 



Table 13. Correction applied to the heat measured for temperature of water and 

 dishes Metabolism experiment No. 59 (December 18-19, 1903). 



Time. 



Article. 



(a) 



Specific 

 heat. 



CM 



Weight. 



W> 



Temper- 

 ature. 



(d) 



Temper- 

 ature 

 of calo- 

 rimeter. 



(6) 



Differ- 

 ence. 



if) 



Heat 



(axbXe). 



Grams. 

 400 

 297 



400 

 640 



400 



297 

 1743 



400 



297 



Calories. 

 + 4.920 

 + .731 



+ 4.600 

 + 1.472 



+ 4.880 

 + .725 

 - .349 



+ 4.880 

 + .725 



(0) 



Correc- 

 tion. 



Calories. 

 + 5.7 



+ 6.1 



+ 5.3 

 + 5.6 



22.7 



of the nature of close estimates than of scientific experiments, the hydrothermal 

 equivalent of the calorimeter has been found to be 60 kilos. Consequently, to 

 obtain the capacity correction of the calorimeter, the temperature fluctuations 

 in degrees centigrade are multiplied by 60. 



Correction for heat in bedding. The necessity of correcting the heat 

 measured for the heat in the bedding is based upon the fact that during the 

 period from 10 p. m. to 1 a. m., when the subject retires at night, a considerable 

 quantity of heat is produced which is not liberated into the air of the chamber, 

 but is retained by the bed and bedding until some time after the subject has 

 risen in the morning. From the heat eliminated and other factors it has 

 been computed, though by crude methods, that 30 calories of heat are thus 

 absorbed and liberated by the bedding. Consequently, during the first period 

 in the morning, there is a certain increment of heat measured by the water- 



