156 Miscellames. 
then boiled with animal charcoal to remove color, filtered hot, crys- 
tallized repeatedly, and dried without access of light. About one 
ounce of salicine will be obtained in the large way 5 probably twice 
the quantity would result, for great loss is occasioned by the above 
; operations. It may be preserved in well closed _ bottles, 
sid enol attract moisture. 
From the experiments of Miquel, Husson, Bally, Girardin, Cog- 
non, &c. at the hospitals and elsewhere, it is proved that from twenty 
four to thirty grains of salicine will arrest the return of the fever, 
whatever may be its kind. This is nearly the same as the dose of 
sulphate of quinia.—Jdem. 
10. Malic Acid.—(Liebeg, Ann. de Chim.)—This curious vege 
able acid has been obtained pure and crystallized, by M. Liebeg, and 
carefully analysed, for the purpose of setting the discordant results of 
different chemists at rest. It was obtained from the expressed juice 
of the ripe fruit of the mountain ash, by a complicated chemical 
is 
The equivalent number of the pure acid and its atomic constitu 
tion, were obtained by the decomposition of three of its salts; the 
malate of zinc, the malate of silver, and the malate of ammonit 
Its composition may be considered as follows: “ 
atoms of carbon, - - “ te oe 
1 do. hydrogen, - - - r 4 
4 do. oxygen, - - . “ coe 
Equivalent number, = - - ~ “ 57 
Idem. 
11. Manufacture of charcoal.—(Bull. Univ.)—A new process: 
recommended in the Journal des Foréts for this purpose; is to fi 
the interstices in the heap of wood tobe charred with powdered chat 
coal. The product obtained is equal, in every respect, t0 oylimed 
charcoal; and independently of its quality, the quantity obtained § 
very much greater than that obtained by the ordinary method. 
charcoal used to fill the interstices, is that left on the earth after a pry 
vious burning. The effect is produced by preventing much df 
access of air which occurs in the ordinary method. ‘The volume 
charcoal is increased a tenth, and its weight a fifth, —Jdem. 
