H. B. Hill—Ethers of Uric Acid. 433 
0:2362 grm. gave 0°1092 grm. HO, and 0°2978 grm. CO,. 
Calculated for Found. 
C,H,(CH,)N,03. 
C 34°89 84°39 
4°65 5°13 
This substance is apparently isomeric with that described by 
Grimaux under the name Pyruvil.* 
Silver nitrate gives in a hot saturated solution on the cau- 
tious addition of ammonic hydrate, a crystalline precipitate 
consisting of needles or short prisms. This salt is readily 
soluble in hot water, more sparingly in cold. By spontaneous 
evaporation of the cold solution, tolerably perfect crystals of 
the trimetric system were obtained. This compound may be 
dried, without decomposition, at 100°, and gave then on 
anal ysis, — 
0°1668 grm. left on ignition 0°0646 grm, silver. 
Calculated for Found. 
Ag, H,(CH;)N,93. 
Ag 38°71 38°61 
Biyert has shown that allantoin, when heated with hydri- 
odic acid, breaks up into urea and antoin; and it was 
acid, following the directions given by Bayer. When the 
reaction appeared to be ended, the liberated iodine was reduced 
plumbie carbonate. The filtrate gave on evaporation, after 
standing for some time, clear crystals, which, freed from the 
3 
NH, N—CH, 
7 
C,H,(CH,)N,0,+H,=CO baie 
‘vu, NH—CO 
. Berichte Deutsch ; i 
. Chem. Gesellsch. 1790. : eS . 
t Ann. Chem, u. Phakais savih 178. Shi , xxx, 158. § Ibid., cxxxvil, 288, 
