DAILY INGESTA AND EGESTA. 



901 



constituents, and that of the various excreted matters. The chemical 

 constitution of the ingesta which pass into the body, must be compared 

 with that of the egesta which pass from it two terms of an equation, 

 which, if our means of experiment, and our knowledge, were exact, 

 should be shown precisely to correspond. This comparison has been 

 attempted by Vierordt, as shown in the following Tables, in which the 

 quantities given by him in grammes, have been reduced to ozs. avoir- 

 dupois : 



A. INGESTA DURING 24 HOURS, IN ozs. 



B. EGESTA DURING 24 HOURS, IN ozs. 



In Table A, the quantities of the various constituents of the daily 

 food, solid and fluid, are the same as those quoted in p. 898. The 

 daily amount of oxygen introduced into the system, is calculated from 

 the quantity known to be given off, in that period, as carbonic acid 

 from the lungs and skin. The quantities of hydrogen and oxygen 

 which exist in the carbhydrates, in the proportions to form water, are 

 set down as water. 



In Table B, the ultimate destination of all the chemical elements of 



