428 Chemical Action of Bodies on each other [Junn, 
triturated together, remained whitish-green. Alcohol at first pro- 
duced no alteration on this mixture; but by degrees the colour 
became blue. Water poured upon the mixture occasioned effer- 
vescence, and the colour became blue. Both these salts are inso- 
uble in cold alcohol. 
Quick-lime heated a second time, being triturated with calomel, 
the mixture remained white. Alcohol did not alter the colour. 
Water rendered it blackish. Quick-lime and corrosive sublimate 
triturated together remained white, but became brownish-red when 
left for some time exposed to the atmosphere. Not only water, but 
alcohol also, produced this change on the mixture. It is well 
known that calomel is insoluble, and corrosive sublimate soluble, in 
alcohol. 
Effloresced carbonate of soda heated, and anhydrous sulphate of 
copper, being triturated together, remained white. Water gave the 
mixture a green colour. Alcohol did not alter it. In the air it 
became green. The same soda triturated with calomel remained 
white. Water rendered the mixture brownish, and then blackish. 
Alcohol produced no alteration. The same soda triturated with 
corrosive sublimate remained white; but water and alcohol rendered 
the mixture brownish-red. R 
Prussiate of potash and green sulphate of iron, both anhydrous, 
being triturated together, remained white. Alcohol gave the mix- 
ture a grey, and water a blackish, colour. The green sulphate of 
iron was not quite free from persulphate, which is soluble in 
alcohol. 
Powdered nutgalls heated, and triturated with anhydrous proto- 
sulphate of iron, occasioned no change of colour. Alcohol did not 
alter the colour, but water rendered it black. 
Litmus, heated till it was quite dry, and then triturated with 
succinic acid, underwent no change of colour. That water poured 
upon the mixture should give it a red-colour, might have been ex- 
pected; but alcohol produced no alteration in the colour. But 
when the alcohol was evaporated, the colour became red; and this 
alteration took place the sooner the more fully the mixture was ex- 
posed to the air. Alcohol, then, facilitates the absorption of 
moisture from the atmosphere. The reddening of litmus tincture 
proceeds entirely from water, for succinic acid is soluble in alcohol. 
The same phenomena take place with benzoic acid. 
I triturated together sulphur and phosphorus. After some time, 
the two bodies united into a yellowish liquid. Mr. Schaub first 
made this observation (Scherer’s Allg. Jour. der Chemie, vol. viii. 
p- 217). He thought that an oxidation was produced by this 
process. But the liquidity is not owing to this cause ; for the sub- 
stance again becomes solid when left to itself; and the same thing 
takes place when cold water is poured upon it. Hence the liquidity 
of this very easily liquified compound is occasioned by the heat 
evolved during the trituration. But the compound is very easily 
oxidized, as water left upon it reddens litmus tincture. When 
ee en ee 
