of <£&pmtcal P;tttpttatton* 3 5 



fens that agitation of the parts of the 

 Menftruum that is neceflary to the 

 keeping the diffolved body in the 

 ftateof fluidity, (hould occafion the 

 falling of it again to the bottom. In 

 flow operations I could give divers 

 examples of the precipitating power 

 of Cold 5 there being divers foluti- 

 ons and particularly that of Amber- 

 greece, that I had kept fluid all the 

 Summer, which in the Winter would 

 fubfide. And the like may be fotne- 

 times obferved in far Ids time in 

 the folutions of Brimftone made in 

 certain oleaginousMenftruumsjand I 

 have now & then had fome folutions, 

 and particularly one ofBenzoin made 

 in fpirit of wine, that would fur- 

 prize me with the turbidnefs ( which 

 begins the ftate of Precipitation) it 

 would acquire upon a fudden change 

 of the weather towards Cold 5 though 

 it were not ip the winter feafon. 



Another way of weakening the 

 Menftruum andfocaufing the Preci- 

 pitation of a body diffolved in it, is 



the 



