G. F. Barker—Physiological Chemistry. 233 
1. On Hematoidin. ‘ 
Hotm has published* the results of a research upon this 
substance, made in the laboratory of Professor Stideler in 
Zurich. The investigation was undertaken for the purpose of 
fixing more accurately the properties of heematoidin, as well ag 
tosettle the question of its identity with bilirubin. To this 
end, Holm first prepared this latter body, both from gall-stones 
and from human bile ; confirming minutely all the properties 
_ previously assigned to it by Stadeler. 
___The hematoidin was obtained from several sources. Apo- 
plectic clots in the brain were first used ; but the quantity thus 
obtained was small, permitting merely the fact of the yellow 
color of the chloroform solution and its change to green on 
t=) 5 
Power of 300 diameters ; though aggregations of short needles, 
_ and irregular reddish tables were noticed, which, especially in 
the younger bodies, were mixed with yellow fat, Nitric acid 
e ne nitric peroxyd tinged the mass greenish-blue, tran- 
__ Both chloroform and carbonic disulphid may be used for the 
o Baetion of hematoidin, since both yield it crystallized, 
 Bolm’s process of preparation was as follows: All the red and 
= i the ovary with scissors, bee! as 
allowed to stand for several days, 
pon filtration, a deep gold-yellow 
Sap of the hema ome 
¥s that crystallization began. As it proceeded, the fat gave 
Ax. J, * J. pr. Ch, ¢, 142, March, 1867. 3 goree 
“TOUR. Sct—Sgconp Sentes, Vor. XLVI, No. 137,—Szpn., 1868. e 
Boe 16 : 
