Chemistry and Physics. 149 
2. On Chry pair iae - Dioxyquinone of Chrysene.—In the 
course of an exam on of certain specimens of commercial 
alizarin, CLaus ser in one of these a special substance, the solu- 
tion of hie +h in potassa gave a blood-red color, instead of the vio- 
let tint of potassium alizarate. It is separated. from the alizarin 
dry 
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at 305°-310°, condensing ane in brilliant orange needles. Anal- 
ysis gives as ‘its formula ,g,,0,, and that of its potassium salt 
C,,(K,H,)O,. The author, hence, considers it the dioxyquinone 
of chrysene, and gives it the name ‘chrysez zarin. One kilogram - 
alizarin paste contains four or five Bt ms of chrysezarin. —HMon 
teur Scientifique, IIT, v, 396, May, 1 
3. Production of "Albumin Srom ¥ bri in.—GAUTIER paws that. 
on dialysing a solution of fresh blood fibrin in sodium chloride, 
the inorganic matters are separated, and there bili TS a liquid co- 
agulated by heat, by mineral acids and by mercuric chloride, the 
seg sen having the ee of those fect pure albumin, — 
—— Rendus, \xxix, 227. 
On the conversion of ‘Brucine into Strychnine. _The ‘close 
Gara relation between the different va Se of the same 
plant-species is a well observed fact. e two bases of the Sérych- 
succeeded in showing that the paalpcis may be produced from the 
latter at will. For tkis purpose the brucine is gently warmed 
with four or five times its weight of dilute nitric acid. The liquid 
ence red and evolves carbonic acid. It is treated with potas- 
sium hydrate in excess, and agitated with ether. This on evapo- 
ration leaves a red mass, from which, on solution and reerystalli- 
zation, a crystallized Ditter substance was obtai ined, having all the 
properties of strychnine. This result is of the greatest practical 
impo 
given a mixture containing lead nitrat d brucine, used the 
Stas-Otto method for detecting alkaloids, and found a substance 
iving the reactions of strychnine. Hence the use of nitric acid 
in examinin ng for alkaloid poisons is to be avoided, since strych- 
nine ma thus formed.— Ber. Berl. Chem. Ges., viii, 212, 
March, 1875. hes #f ae 
Formation of Indol from Egg-albumin, — NEN an 
earlier feet having ascertained the fact that indol bijocted into 
the body produces indigo-blue in the urine, made experiments to 
ascertain if indol was a normal product of pancreatic digestion, as 
n asserted ; and though the results were suggestive, they 
were not final. Kiihne having given it as his opinion that the 
body thus obtained was not really indol, but some other body 
lossy resembling it, Nencki returns to the charge and produces 
