a Saal 
368 A. Schlieper on the Oxydation of Uric Acid 
This body is a new acid for which I propose the name of lan- 
tanuric acid ; 1 shall have an opportunity in the course of this 
paper to return to this subject. 
After the presence of allantoin was proved by analysis, it was 
cleajthat in the adopted way it was impossible, to study the pro- 
cess of oxydation of uric acid here occurring, because the action 
of a hot alkaline solution on the generated products so easily oc- 
casions secondary decompositions. Hence I adopted a new mode 
for the decomposition of uric acid, and carefully avoided he 
thing which could — occasion a decomposition of 
newly generated allantoi 
The solution of uric siti in potassa ley was obtained as before ; 
and to this, an alkaline solution of 5 oz. uric acid in one gallon 
water at 20° C. was added alternately for some time; also ferrid- 
cyanid of potassium and potash ley till all uric acid was comple 
decomposed : to effect this, there were necessary 203 o%. red 
prussiate of potash and 10$ oz. hydrate of potash, which is ex- 
pressed i in equivalents nearly exact 
1 equivalent of uric acid GG; Niky O;. 
2 of ferrideyanid of potassium. 
6 . of hydrate of potassa. 
"Thos there are only two equivalents of oxygen combined with 
one equivalent of uric acid. The alkaline solution was mix 
with pure nitric acid nearly to neutralization, a great quantity of 
carbonic acid developed itself, although the hydrate of potassa 
originally employed in this essay was freshly made and nearly 
ree from carbonic acid, and as far as possible I had prevented 
the absorption of carbonic acid from the air. The solution be- 
came turbid and colored soon after the neutralization, (the same 
takes place when instead of nitric acid, carbonic acid i is used for 
the neutralization of the free alkali,) ‘and after a short time, @ 
small ned of a light flocculent dirty wane at er 
tion of the rnaiael ge le Pah the precipitation : a peter excess 
of lead oxyd by means of sulphate of potassa, the solution was 
then perfectly neutralized with potassa, after which operation it 
