THE ANIMAL AS A MOTOR. 



73 



23. Dietaries. — Dr. Pavy gives the following as the 

 quantities of the specified foods required to support 

 human life * : 



Nitrogen , 300 grains. 



Carbon 4800 " 



Carbon. Nitrogen. 



14,000 grains (2 lbs.) of bread contain 4200 140 



5,500 " (about f lb.) of meat contain 605 165 



Total (2f lbs.). 4805 305 



Six pounds meat \ ^^^^ 



( 1309 " nitrogen. 



Four pounds bread ] ^ooo grains carbon. 



( 300 " nitrogen. 



The estimates of Moleschott for weight of foods in a 

 dry state, for the average individual, are as follow : f 



Dry Food. 



In Oz. 

 Avoir. 



In Grains. 



In Grammes. 





4.587 



2006 



130 





2.964 



1296 



84 





14.250 



6234 



404 



Salts 



1.058 



462 



30 



Total 



22.859 



9998 



648 



Reckoning ordinary food to contain ^0% of water, then, these 23 

 ounces will correspond to 46 ounces solid food in the condition eaten 

 — additional to this, 60 to 80 ounces of water is taken in some form. 

 The dynamic or force-producing value of this daily standard diet 

 amounts to about 4000 foot-tons. 



The relative values of the common articles of diet 

 are given by Scammell as follows :j; : 



* Treatise on Food, p. 473. 



f Ibid., p. 452. Also Mott's Chart (N. Y., J. Wiley & Sons, 1889). 

 X Mott's Chemist's Manual, p. 575. 



