eee rit mons er nap Ne en cet meh greece 
Professor Dana on Morbid Animal Products. 151 
was decomposed, and afforded of pure silver 1.54 grs. Now 
1.54 grs. of silver are equivalent to 1.65 of oxide of silver, 
hence the precipitate, urate of silver, consists 0 
Oxide of silver 1.65 or 42.85 1. proportion 118. 
Uric acid 2.20 - 57.15 34? x5 nearly 170. 
3.85 100.00 
Now 165of oxide of silver combine with 0.754 nitric acid 
to form nitrate of silver, and this quantity of acid combines 
with 0.239 of ammonia to form nitrate of ammonia; this 
then is the quantity of ammonia which was combined with 
the uric acid, separated by the pss by double Secure? 
sition ; urate of ammonia then consi 
Uric ee 2.200 90.15 5 proportion nearly, 34?x 5. m 
Amm Seta UR fod 1 proporti 
2.439 439 100.06 00 
This calculus is composed, according to the above exper- 
iments 0 
Urate of Ammonia 2.439 - - 30.49 
Uric acid and Urea 5.561 - - 69.51 
¢ | 8.000 _—-100.00 
‘These analy see cannot be ee, tried by the the- 
ory of definite proportions, because the equivalent number 
for uric acid is not well ascertained. According to — 
Tuomson, it is 34, hydrogene being 1. Accordin 
BranDe it is 35, hydrogene being 1, and oxygene 8. . hes 
Lussac has stated that uric acid contains one atom of azote 
and two atoms of carbon. Dr. THomson supposes that 
these are united with one atom oxygene. Dr. Prov, as 
quoted by Branpe, states it to consist of one atom each of 
oxygene, hydrogene and azote, and two atoms of carbon. 
r 
gene and hydrogene unite and form water when the acid 
combines with a a basis; perhaps this is the fact, and the 
above analyses and this view of the subject mutually confirm 
ome — for, 
