162 Miscellaneous Intelligence. 



represent the number of einchonia, oxygen being 1 *, and that the 

 neutral sulphate contained 



Crystallized Dry 



1 atom einchonia . 39 84.324 . . . 88.636 

 1 sulphuric acid 5 10,811 . . . 11.364 



2 — water . . . 2.25 4.865 100.000 



100.000 



Super Sulphate of Cinchonia. 



Crystallized Dry 



1 atom cinchonia . 39 67.241 . . . 79.592 



2 sulphuric acid 10 17.241 . . . 20.408 



8 water ... 9 15.518 . . . 100.000 



100.000 



Neutral Sulphate of Quinia. — This salt readily effloresces in the 

 air, three-fourths of the water passing off, and one-fourth re- 

 maining. Soluble in 740 of water at 55.4° Fahr., and in 30 parts 

 at 212°. Alcohol of specific gravity 0.85 dissolves ^^^ at common 

 temperature ; in much greater proportion at the boiling heat. 



Super Sulphate of Quinia. — When pure, colourless, unaltered 

 in the air at common temperatures : crystallizes in rectangular 

 prisms, cleaving parallel to the planes of the prism. Tlie crystals 

 obtained by diminished temperature are small and acicular, but 

 spontaneous evaporation yields them of a large size. It is solu- 

 ble in 11 of water, at *5°.4 Fahr. ; in 8 parts, at 7l°.6 Fah. ; 

 and in its water of crystallization at 212° Fahr. It is soluble in 

 alcohol, and the crystals obtained from solution in absolute 

 alcohol immediately fall into powder in the air. 



Some of the crystals still wet were put upon filtering paper, in 

 a cold damp place : when dry they were rapidly weighed, and 

 then left to effloresce at a temperature of 68°. In this way it lost 

 three-fourths of its water, and the other fourth also when dried 

 in a stove. The dry sulphate exposed to the air resumed the 

 fourth it had lost in the stove. 



The experiments of M. Baup led him to adopt the number 45 

 for quinia. The composition of its sulphates are according to him 

 as follows : 



Super Sulphate C~ ' '^ Crystallized Dry ' 



1 atom quinia . . 45 61.644 . . . 81.819 



2 sulphuric acid 10 13.698 . . . 18.181 



16 water . . 18 24.658 100.000 • 



100.000 



J Neutral Sulphate Crystallized Dry 



1 atom quinia . . 45 76.272 ... 90 



1 sulphuric acid 5 8.474 ... 10 



8 water . . 9 15.254 100 



100.000 



* Cinchonia 812, hydrogen being 1. Qninia, 360. 



