Ohervatlons on the Manvfaciiirc of Pot Ash 



1G9 



until evaporation shall cease. Then the fire must be increased, 

 until the salts are perfectly fluxed, for the purpose of destroj- 



the inflammable substance, with Avhich most of thorn 



iimple 



Let 



Then 





abound j which may be determined by t 



e some pot ash and dissolv 



folIo\v 



method 



Tal 



water. 



there be as much pot ash as the water will dissolve, 

 plunge a piece of silver coin, or any thin plate of silver into 

 the solution. If the pot ash contain any inflammable matter, 

 it will change the silver to a dark or black colour, in the 



ame manner 



had been 



the steam of bi" 



o 



sulphur. By thi^ 'easy ex^^eriment, the manufacturer will 

 be saved the expense and mortification of carrying pot ash 

 to market, which must sell for a very reduced price. Should 

 the workman discover, on the experiment being made, the 



called by the workmen 



exist . in the pot 



inflammable principle, or 



oily substance, or fire, to 



medied only by dissolving it in pure 



down and fluxing it a second time. 



into pearl ashes, by calcination, with little expense, 



b 



water, and boiling 



it 



Or, it may be made 



Some manufacturers may 



be discouraged 



from 



going 



through this process, by the labour necessary in shifting the 

 lie so often. But if they consider the advantages they will 

 obtain in fluxing their pot ash, which will be efiectcd in less 

 than half the time required in 



the usual waj^ and tlio great 



4 .^-«*<«« -^ ^ 



<r in the expense of kettles, by the lies being made 



Ci 



nd pure, they 



be 



standing the trouble ; as 



)onciled to the method, notv 

 their interest will be found 



experiment 



be 



ned in its adopt 



and 



as 



their 



pot ash will find a more speedy market 



and obtain a high 



b 



X 



er 



