Metabolism Experiment No. 72. 135 



Allowance has been made in column a of table 91 for 51 grams of water 

 excreted in the feces. This amount was obtained by multiplying the amount 

 of feces passed by the average per cent of water of feces in experiments JSTos. 

 74 and 76, and hence is an assumption. The fact that the water content 

 of the feces passed on this day was not known, however, made the assumption 

 necessary. It therefore follows that the loss of preformed water shown in 

 column / of the table may not be the true loss, though there are indications 

 that the amount is but a few grams from the actual. 



Nutrients, ash, and energy. In table 92 are recorded the balances of nutri- 

 ents, ash, and energy. As previously explained (see table 88) the data for 

 absorbed materials are estimated on the basis of dry matter. The energy 

 shown in column d, table 92, is computed by use of the heats of combustion of 

 body material as applied to the amounts given in column a of the table. 



