' WITH THE' MARINE ACID? 



heat in all rcfpecls fimilar to white precipitate*. 

 Whether the experiment has been made by a- 

 ny other pcribn, I am altogether ignorant. 



xix. JVbitc me rent nil Precipitate dijfcfacd in 

 Water. 



IT is not yet fufliciently afcertaincd what 

 weight of white mercurial precipitate can be dif- 

 folved in a given quantity of water. The qucf- 

 lion is even difficult to be determined; as from 

 the various proportion of the acid in this fait, 

 it* folution in water is cither aflifted or impeded. 

 The time and manner alfo of the folution arc 

 principle objecls of confideratiorh For in that 

 moment 'when the acid firft acls upon the mer- 

 cury, the fait fo produced is cafily folublc in wa- 

 ter; but, if the precipitate is collected in the 

 form of a coagulum, its affinity with that fluid 

 is much diminifhed. Sal ammoniac affords con- 

 fidcrablc aifilhuicc to the folution, whether it 

 be made in water or in fpirit of wine. 



The difficulty of the folution prevents the 

 white precipitate from forming into larger cry- 

 fbils, with the true form of which we are there- 

 fore yet unacquainted. 



2, 3 



11 Eflay for a reformation of ilie LonJon Plumi. 



