28 
Wright in the case of black-ash ; (2) boiling with water 
containing certain salts in solution, such, e.g ., as sodium 
sulphide. We hope by obtaining a closer knowledge, at all 
events, of the properties and behaviour of this singular 
compound, to find at length, peradventure, a practical and 
ready means for extracting it, and thus doing a service to 
the alkali manufacturer. 
