cumstances under which they are formed—length of time in boiling, con 
centration of solution, &c.,—since two of the analyses made agree with 
the formulas of sulphids, without oxygen. One of these was formed 
ration was continued, and the solution deposited a large quantity of a 
bright red crystals. The reactions of these corresponded to those of 
red sulphite, mentioned above. This gives, therefore, a new method 
Preparing the above salt. , 
‘he yellowish precipitate, just mentioned, may also be obtained by 
