26 W. Gibbs on the Constitution of Organic Compounds. 
If this view be correct we ought to find the radical Cia 
among the products of the decomposition of alanin. In point 
of fact, when heated with peroxyd of lead it yields aldehyd, am- 
monia and carbonic acid, the carbon of the radical formyl C2H 
alone being oxydized. With nitrous acid alanin yields lactic 
acid, the formula of which is thus found to be aie 
CsH302 
O2H 
H 
O41, 
H 
Now lactic acid, when heated with sulphuric acid and peroxy 
of manganese, yields carbonic acid and an abundance of aldehy 
as Stideler has shown. Both the mode of formation and th 
or {oso 
In this case it should give with nitrous acid a species of lacti¢ 
acid isomeric with that derived from alanin and having the — 
formula 
C2HO2 
ne O04, 
N ; C1302. O2Hs. CuHsO2,H O2 Alanin-hippuriec acid. 
H 
CHHs02.C:H..Culls0.H $04 — Benzolactie acid. 
