A 5 on many becafions, Chymifts 

 call the iubftance that is made to fall 

 to the bottom of the liquor^ the Pre* 

 cipitate i fa for brevity fake we (hall 

 call the body that is put into the li- 

 enor to procure that fubfiding, the 

 Precipitant 5 as alfo that which is to 

 be (truck down,, the Precipitable fuh- 

 fiance or mattered the liquor where- 

 in it fwims before the feparation y 

 the Menfirunm or Solvent. 



When a hafty fall of a heteroge- 

 neous body is procured by a Precipi- 

 tant ^the Operation is called Precipi- 

 tation in the proper or ftrift fenfe: 

 But when the feparation is made 

 without any fuch addition^or the fub- 

 ftance, feparated from the fluid part 

 of the liquor 5 ihftead of fubfiding 

 emerges, then the word is ufed in a 

 more comprehenfive^but lefs proper^ 

 acceptation. 



As for the Caufes of Precipitation 

 the very name itfelf in its Chymical 

 fenfe haying been (carce heard of in 

 ahe Peripatetic Schools^it is not to be 

 expeftedjthat they fliould have giyep 



' ' ' us 



