NAT. ORDER. CINCIlONACEiE. 
31 
It is very soluble in ether, while cinchonine is very little so ; this 
difference serves as well to distinguish their bases, as to separate 
them when united. Quinine likewise differs from cinchonine in 
containing oxygen, and that in nearly as large a proportion as hy- 
drogen. According to M. Brande, its ultimate parts are nearly as 
follows :— Carbon 73,80— Nitrogen 13,00— Hydrogen 7,65— Oxy- 
gen 5,55 — 99,90. Quinine when melted becomes ido-electric, and 
acquires the resinous electricity with much intensity when rubbed 
with a piece of cloth. 
M. Robiquet, in the Journal of Science, has given an analysis of 
the two sulphates of quinine, but he found that the sub-sulphate lost 
a portion of its acid during each chrystalization ; he has given the 
composition of this salt, both after the first and third crystalization, 
as follows : — 100 parts of Acid Sulphate of Quinine contain — Acid 
19,1 — Quinine 63,5 — 82,6 — 100 parts of Sub-Sulphate, first crystal- 
ization, contain — Acid 11,3 — Quinine 79,0 — 90,3. 
The Sulphate of Quinine, when exposed to the temperature of 
100° (212° Farenheit) becomes luminous, especially when subjected 
to slight friction. This remarkable property was first discovered 
by M. Callaud d' Annecey, a French chemist. "M. M. Dumas and 
Pelleties exposed about three ounces of the sulphate, enclosed in a 
glass flask, which they kept in a sand-bath for half-an-hour, to the 
temperature of boiling water, when it exhibited, on friction, a briliant 
white light. On passing through the cork of the flask a metalic rod, 
ending in a point at the internal extremity, and by a ball at the op- 
posite one, and applying it to the ball of the rod by a voltaic elec- 
troscope, shaking the flask before each contact, these gentlemen ob- 
tained the greatest separation of which the rods of the electroscope 
are susceptible ; the electricity was always vitreous. The Sulphate 
of Cinchonine possesses the same phosphorescent property, but in 
a less degree, and the electric faculty in the same ratio." 
Medical Properties and Uses of Peruvian Bark will be found 
under the head of Cinchona Officinalis; we shall therefore intro- 
