ON AMORPHOUS QUININE. 
1S5 
I. From the quinoidine of Mayence, 0.490 grammes yield- 
ed 1.3204 grammes of carbonic acid, and 0.3395 grammes 
of water. 
II. From the quinoidine of Frankfort, 0.618 grammes 
yielded 1.6575 grammes of carbonic acid, and 0.4250 gram- 
mes of water. 
III. From the quinoidine of Coblentz, 0.3475 grammes 
yielded 0.9475 grammes of carbonic acid, and 0.2375 gram- 
mes of water. 
According to these analyses, this substance contains— 
i. ii. in. 
Carbon 73.49 73.14 74.33* 
Hydrogen 7.69 7.64 7.57 
The determination of the nitrogen, by the method of 
Verrentrapp and Will, yielded the following results : — 
0.515 afforded 0.2S9 of platinum. 
0.617 " 0.401 " 
And. consequently, the substance under examination con- 
tains, according to the first analysis, S.04 of nitrogen ; ac- 
cording to the second, 9.54 of nitrogen — the medium of the 
two analyses giving us as its amount of nitrogen, 8.79. 
Analyses of the Chloride of Platinum and the base from 
Quinoidine, {Amorphous Quinine.) 
I. 0.6663 grammes of the double salt yielded 0.1755 of 
platinum ; 0.8700 grammes of the double salt yielded 1.349 
carbonic acid, and 0.303 of water. 
II. 0.881 grammes of double salt yielded 0.224 of plati- 
num. 
III. 1.066S grammes of double salt yielded 0.2715 of 
platinum. 
From these analyses, therefore, the following are the pro- 
portions of carbon, hydrogen, and platinum, which exist in 
100 parts of the chloride of platinum, and the substance de- 
rived from quinoidine : — 
* Cavbon=75. according to Prout and Dumas. 
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