140 Progress of Foreign Science. 
and calcined, in order to get the pure oxide. M. Laugier advises 
in preference to wash away with hot water the nitrate of ammonia, . 
and to calcine the remaining carbonate of uranium which has in the 
filter, a fine lemon yellow colour.—Journal de Pharmacie, March, 
1823, 
On the Oxides of Nickel. By M. J. P. Lassaigne. 
The metal was purified by Laugier’s process. The protoxide is. 
obtained from solutions in acids, it is of an ash-grey colour, gives 
green solutions with acids, from which caustic alkalis precipitate 
it of apple-green colour. Its constituents are 
1 ATS 1) ete ee ae - 100 
eye CR ie Se) oe 20 
Whence the atomic weight of nickel appears to be 5. The deut- 
oxide is of a brilliant black colour, having some analogy with the 
peroxide of manganese. Ata red heat it gives up a portion of its 
oxygen, and passes to the state of protoxide, It is prepared by 
treating the hydrated protoxide with chlorine. M. Lassaigne’s 
experiments on its composition, give — 
Bead! ® gy FS) 5 pvelvat « +4100 
Oxygen ...... at oe 39°44, 
approaching sufficiently near to 40. 
The sulphuret artificially made is of a brilliant yellow colour, like 
iron pyrites, and is very brittle. It consists of 
DHGRCL ~ 4 laste eta ghey DA + ant 100 
MOREY ate pe. “we cose s “ay eee 
or one atom of each. 
He describes a chloride and bichloride, and an iodide, whose 
constitution may be inferred from the above numbers. 
On the Gaqnet y of Saturation of Delphia. By M. Feneulle, of 
Cambray. ' 
Neutral Sulphate—Acid . . , 3:031 5-0 
Delphia . . 96°969 16:0 
Subsulphate—not distinctly characterized. It seems to have a 
double dose of base. The muriate of delphia is amorphous like 
the preceding. It is formed of 
Muriatic Acid . . . 100 2°136 
Delphia. . . . . 4675 100-000 
There is also a submuriate. It consists of 
ARI A jie, gl deOe 
Delphia . « ~ 100-000 
