Chemistry and Physics. 55 
fluorescence. Kopp assigns to brazilin the formula C,,H,,0, ; 
and supposes the following relation to exist between brazilin, 
hematoxylin and resorein :— 
IT Be 
Vapaggoe F FsO = Ciste O eta 
— Ber. Berl. Chem. Ges., vi, 446, April, 1873. G. F. B. 
8. On the synthesis of an Isomer of Urie acid.—Muver has 
re-Investigated the constitution of uric acid. The four most prob- 
able formulas for this constitution are the following :-— 
A. Strecker’s. co”. 
\wH-.-00~.- 00 
NH-.-CO 
B, Erlenmeyer’s. éo CHN-=:=C s<NH 
1 ' 
NH-.-CO 
CO-.-NH-.-CN 
C. Kolbe’s. CH-.-HO 
(Oxymaloncyanamide). A 
CO-.-NH-.-CN 
,NH-.-CO,, 
D. Mulder’s coe >} CH-.-NH-.-ON 
(Dialurcyanamide). *< NH-.-CO- 
