EK Mahla on Hydrastine. 59 
IL. 0:5085 hydrastine, burned with oxyd of copper, gave 
12377 cig acid, and 
0°2608 wa 
Ill. 04469 Siti <sceee with soda-lime for nitrogen-determina- 
ion 
0°2727 RMN ART of platinum. 
TV. 0°5904 hydrastine, burned with And lime, gave 
0°3542 ammonio-chlorid of platinu 
These results lead to the ito percentage composition : 
I, Il. IIt. IV. 
C = 66°696 66°379 
i. = . Sure 5698 
aS 3°832 3°767 
In sider & to determine the formula of the alkaloid, I selected 
the platinum double salt, prepared by precipitating the hydro- 
ehlorate of hydrastine with chlorid of platinum, and the hydro- 
chlorate itself. 
The chloroplatinate of hydrastine is an amorphous reddish- 
yellow powder, which is slightly soluble in water, better, how- 
ever, in alcohol. When its alcoholic solution is boiled for some 
time, the platinum separates in the form of a black powder. 
id j in which this deposit forms, has a remarkable blue 
e. 
Chloroplatinate of hydrastine fuses, when heated to little 
above 100° C.; it decomposes readily when heated higher. 
10079 chloroplatinate me hydrastine, desiccated at 100° C., gave on 
c 
0°1630 platinum 
This corresponds to 16-17 p. c. platinum. 
The chlorhydrate of hydrastine =o gees by dissolving pure 
hydrastine in diluted chiorhydric The tained 
is evaporated over the witarbaile ti ‘dr. — Tt Pad forms 
a , amas white feta — ean be readily powdered. 
0°7258 iy deocilieats of Sperm gave 
0°2419 chlorid of silver. 
This amount corresponds to 8° 46 p. c. of chlorhydric acid. 
From these results, I caleulate C,,H,,NO,, as the formula 
py equivalent for hydrastine. Indeed, if we figure the per- 
centage composition of a body with this formula, and compare 
it with the. obtained data, we find that they agree well: 
