of gft&pmical ^ettpitatiom 19 



thofe, whereof the Aerial bubbles 

 made a part, will yet be Specifically 

 heavier than the former Aggregates 

 were, and may thereby overcome 

 the-fuftaining power of the Men- 

 ftruum. 



pne thing more may be fit to be 

 taken notice of before we pafs on 

 further, namely, that 'tis upon the 

 fcore of the Specific gravity of a bo-? 

 dy, and not barely upon thea&ion of 

 the Precipitant, that an aggregate or 

 a Convention of particles does ra- 

 ther fall to the bottom than rile 

 t o the top. For, though the A- 

 gents that procured the Coalition, 

 make the clufter of particles become 

 of a bulk too unwieldy to continue 

 in the liquor as parts of it 5 yet if 

 each of them be lighter infpecie than 

 an equal bulk of the Menftruum, or 

 if they fa convene as to intercept a 

 fufficient number of little bubbles or 

 aerial Corpufcles between them, and 

 fo become lighter than as much of 

 the Menftruum as they take up the 

 IQpm of ? they will not be precipitated 



but 



