112 Scientifie Intelligence. 
The antimonial taches under the same circumstances, become of a car- 
melite yellow, which, by emote to the air, passes to. an orange oe 
then they remain unchan 
The alcoholic solution of riodine dissolves instantaneously the ciecuiial 
tache. The antimonial tache is not acted upon immediately by the same 
solution, although as the solution evaporates, the metallic antimonial 
tache is replacad by one of an orange red, ne ioduret of eae ) 
JT Be 
6. On the Decbunipinition tind ‘Analacis of the Coiislaniee of Ammo- 
nia and Cyanogen ; by R. Smitu, (Phil. Mag., March, 1846, p. 222.) 
—The ammonia compounds are analyzed by liberating all their nitro- 
gen by means of some of the chlorine compounds, and estimating the 
amount of ammonia by the gaseous nitrogen. ‘The chloride of lime 
was the salt usually employed for this purpose. This method is re- 
garded by the author as being peculiarly applicable to the analysis of 
organic substances. He also proposes the employment of chloride of — 
lime as a ready and accurate method of estimating the quantity of ni- 
trogen contained in urine, from the amount of gas deengtes by its 
action in the nitrogenous compounds. 
Hydrocyanic acid and the cyanides are also very rapidly eon 
by the chloride of lime or soda, yielding nitrogen gas and woes 
of lime or soda. The author has also discovered that the | 
decompose uric acid in a very satisfactory manner, and he is ealtell 
to believe that they may be et -as solvents for uric 
acid calculi in the meee és 8. 
4. Pre Hopophiaphite’ Rating sh Wantz, 
(Ann. de Chim. et dle rst Feb. 1846.)—This salt is prepared by boil- 
ing a solution of sulphuret of barium with phosphorus, until gas ceases 
to be evolved. If the ebullition be continued long enough, the whole 
of the sulphuret will be decomposed ; should this not be the case, it is 
readily got rid of by the addition of a little carbonate of lead, or by 
the careful addition of sulphuric acid as long as sulphuretted gas is 
evolved. If an excess of acid be added, it is easily got rid of by @ 
little carbonate of baryta. 
All the other hypophosphites are formed from this by double dence 
position with the soluble sulphates. J. Le S: 
8. New Acid in Tobacco; by M. Barrat, (Comptes Rendus, Dec- 
1845.)—It has been found that the acidity of water in which tobacco 
leaves have been steeped, is due to a new acid, called by the discoveret 
nicotic acid, composed of C?HO2-+-HO. J. L. 8: 
9. Valerianic Acid and a New Substance from Caseine ; by Prof. 
pono HAE und Pharm., Jan. 1846.)—Caseine when 
gas is evolv- 
oOo 
site See 
