304 Intelligence and Miscellaneous Articles. 



hot water its solubility is much greater, and in boiling water it ap- 

 pears to dissolve in any quantity. It is also soluble in alcohol ; but 

 aether and the essential oils do not dissolve it, except perhaps the oil of 

 turpentine. 



Sulphuric acid poured upon salicine, assumes a very fine red colour, 

 perfectly resembling that of bichromate of potash ; with nitric and 

 muriatic acids it forms colourless solutions. It is not precipitated from 

 its solution in water by tincture of galls, by gelatine, acetate or sub- 

 acetate of lead, alum, or tartarized antimony. 



When boiled with excess of lime water, it does not saturate it. 

 Oxide of lead is not dissolved by it. At a few degrees above the tem- 

 perature of boiling water it melts, and on cooling becomes a crystal- 

 line mass; it loses no water during this operation. If the heat be 

 much greater than that of its melting point, it becomes of a lemon 

 yellow colour, and as brittle as a resin. 



Salicine, burnt with oxide of copper in a proper apparatus, yielded 

 a gas entirely absorbable by potash. The mean of two careful analyses 

 gave, as the composition of salicine, 



Carbon 55'49J 



Hydrogen 8*184 



Oxygen 36-325 



100- 

 or in proportions, 



Carbon 2-028 proportions 



Hydrogen 2"004 



Oxygen l'OOO 



Salicine is therefore formed of 



Carbon 2000 proportions 



Hydrogen 2 000 



Oxygen 1000 



Its composition may perhaps be represented by two volumes of de- 

 fiant gas and one volume of oxygen. — Ibid. 



SULPHATE OF BARYTES FORMING A VEIN IN CANNEL COAL. 



To the Editors of the Philosophical Magazine and Annals. 

 Gentlemen, 

 1 was a few weeks since presented with a mineral composed of 

 sulphate of barytes and carbonate of lime, found in a cannel pit, on 

 the estate of the late Duke of Bridgewater, known by the name of 

 Water-gate Pit ; which is situated in the township of Middle Hulton, 

 about two miles south-west of Bolton, Lancashire. 



This mineral is found running through the cannel in the form of a 

 vein, about an inch thick : it is crystallized sulphate of barytes, irre- 

 gularly mixed with transparent crystals of carbonate of lime ; to the 

 outides a quantity of iron pyrites is attached ; its specific gravity 

 varies : some fragments, when freed from pyrites, are of the specific 

 gravity 4'63, others are as low as 4*19. 



I have 



