144 HIPPURIC ACID. 



porated in the final products, it will appear, for exam- 

 ple, that 2 at. of proteine, with the addition of the ele- 

 ments of 3 at. of uric acid and 2 at. of oxygen, might 

 give rise to the production of hippuric acid and urea. 



2 at. proteine, 2 (C 48 N 6 H 36 O 14 ) = C 96 N 12 H 72 O 28 



3 at. uric acid, 3 (C 10 N 4 H 4 O 6 ) = C 30 N 13 H 12 O 18 

 2 at. oxygen = O 2 



The sum is = C 126 N 24 H 84 O 48 = 



_ C 6 at. hippuric acid, 6 (C 18 N H 8 O 6 ) = C 108 N 6 H 48 O 30 

 ~\ 9 at. urea 9 (C 2 N 2 H 4 O 2 ) = C 18 N 18 H 36 O 18 



The sum is C 126 N 24 H 84 O 48 



49. Finally, if we bear in mind, that, in the herbi- 

 vora, the non-nitrogenized constituents of their food 

 (starch, &c.) must, as we have shown, play an essential 

 part in the formation of the bile ; that to their elements 

 must of necessity be added those of a nitrogenized 

 compound, in order to produce the nitrogenized constit- 

 uents of the bile, the most striking result of the combi- 

 nations thus suggested is this, that the elements of starch 

 added to those of hippuric acid are equal to the ele- 

 ments of choleic acid, plus a certain quantity of car- 

 bonic acid : 



2 at. hippuric acid, 2 (C 18 NH 8 O 6 ) = C 36 N 2 H 16 O 10 

 5 at. starch, . . . 5 (C 12 H 10 O 10 ) = C 60 H 60 O 60 

 2 at. oxygen, ... = O 2 



The sum is = C 96 N 2 H 66 O 62 



_J 2 at. choleic acid, 2 (C 38 NH 33 O n ) = C 76 N 2 H 66 O 22 

 ~~ \ 20 at. carbonic acid, 20 ( C O 2 ) = C 20 O 40 



The sum is = C 96 N 2 H 66 O 62 



50. Now, since hippuric acid may be derived, along 

 with urea, from the compounds of proteine, when to the 

 elements of the latter are added those of uric acid 

 (see above) ; since, further, uric acid, choleic acid, 



