234 Intelligence and Miscellaneous Articles. 



substance, combined with animal charcoal, completely decolours the 

 solution of the alkaline matter in sulphuric acid (diluted with three or 

 four pints of water); but it is necessary afterwards to act on the 

 thick solution with alcohol, to separate earthy salts. 



The new vegeto-alkalies exist in the red and yellow cinchona with 

 the quina and cinchonia. The chinioulia h;is more alkaline power 

 and capacity of saturation, and also more medical power, than an/ 

 other vegeto-alkali in the cinchona ; but it resembles them by its 

 insolubility in water, its colour, and taste. Its alkaline reaction on 

 known vegetable colours, and its intimate state of combination with 

 the brown extractive matter, are remarkable. Its salts are very fusible 

 by heat, and become viscid like some balsams. 



According to M. Serturner, in febrifuge power, chinioVdia is as 

 superior to quina and cinchonia as these are to ordinary bark. It is 

 to this alkali that many cinchonas are indebted for their medical 

 powers. M. Serturner has, in many cases, given his new medicine 

 in doses of 2 grains three times per day. The patients take a little 

 vinegar after each dose, for the purpose of saturating the gastric 

 juice, which by its alkaline nature would else decompose the salt. 

 From J 2 to 24 grains have, in all cases, sufficed to prevent the return 

 of the fever ; whilst patients in the same neighbourhood, treated with 

 the sulphate of quina, had frequent returns of the disease. — Hufeland's 

 Journal. Royal Institution Journal. 



ANALYSIS OF INDIGO. 



The following are the results of an analysis of a specimen of 

 indigo, denominated Jinc blue in the Calcutta market, — made in the 

 year 1820 : 



Oxide of iron 5'75 



Alumina 0'75 



Lime 090 



Green vegetable matter . . . 8'80 



Red or brown ditto 2-00 



Pure indigo 79'50 



Loss 2-30 



100.00 

 Royal Institution Journal, Jan. 1830. 



PROCESS FOR PnoCURING BROMINE. 



According to M. Lowig, the following is .an advantageous method 

 of preparing bromine: — He evaporates the mother water of the 

 salt springs of Kreutznach, in large iron vessels, to one-third of its 

 original quantity, and allows ciystallization to take place for some 

 days. He decants the supernatant liquor, dilutes it with water, and 

 adds sulphuric acid until no further deposition occurs : he then strains 

 the liquor, presses the residue, and evaporates it to dryness. The 

 remaining matter is dissolved in an equal weight of water : by this a 

 great quantity of insoluble sulphate of lime is separated; it is then 



distilled 



