2i8 Mr. Hatchett’s analytical Experiments , &c. 
when dissolved in acids, may be precipitated, combined with 
resin, by adding the former to the alkaline solutions of the latter. 
I have made some experiments of this kind with success ; and 
perhaps these processes might prove useful to dyers and manu- 
facturers of colours. It is probable also, that medicine may derive 
advantages from some of this extensive series of alkaline and 
acid solutions of the resinous substances. 
