PROCEEDINGS 
OF 
THE ROYAL IRISH ACADEMY. 
1838, No. 13, 
June 11. 
SIR Wm. R. HAMILTON, A. M., President, in the Chair. 
Godfrey Levinge, Esq., John H. Lecky, Esq., William 
Brennan, Esq., and David Aher, Esq., were elected Mem- 
bers of the Academy. 
—— 
Dr. Kane read a notice “ On the Action of Arseniu- 
retted Hydrogen on Sulphate of Copper, and on the Manga- 
nese Alum analysed by Dr. Apjohn.” 
The author stated, that on passing dry arseniuret of hy- 
drogen over dry sulphate of copper, it is absorbed with the 
evolution of considerable heat ; much water is evolved, and 
a black mass is formed, which consists of sulphuric acid, 
arsenic, and copper: the whole of the oxygen of the oxide 
of copper being removed with the whole of the hydrogen of 
the arseniuret of hydrogen. The re-action is 
3 (s03 + cu 0) (3s03 + Asz Cus) 
7 = = 3 
(Aso + Hy) 3 (Ho). 
The formation of this body, appears to Dr. Kane to render 
probable the idea that a quantity of arsenic equal to one- 
third of the double equivalent, jas = 25,13, combining with 
metals may form compounds similar to oxides, and thus the 
body just noticed be a sulphate of that arseniuret of copper, 
T 
