12 0f tty $)ecjranical to&ftfnt of 



been taken, the Solution, though at 

 firft altogether liquid^ and as to (enfe 

 uniform^ comes to have after a 

 while a good quantity of coagula- 

 ted of cryftalliz'd matter at the bot- 

 tom 5 of which the caufe may be, 

 that in the very aft of Corrofion 

 there is excited an intenfe degree of 

 heat 5 which conferring a new de- 

 gree of agitation to the Menftruum, 

 makes it diffolve a good deal more a 

 than afterwards^ when the Conflidl 

 is over, it is able to keep up. 



EXPER. IV. 



WE have obferved alfc , that 

 Agitation does in fome ca- 

 fes <o much promote the DifTolutive 

 power of Saline bodies, that though 

 they be not reduced to that fubtilty 

 of parts to which a ftrong Diftil- 

 lation brings them \ yet they may ia 

 their groffer and cruder form have 

 the power to work on Metals y as I 

 elfe where (he w ? that by barely boil- 

 ing 



