18 ©!tt>e ^ec^anital €aufe# 



is afforded by common water in our 

 Pneumatical Receivers d when the 

 incumbent air th^t before preffed the 

 liquor, is pumpt our. And if the 

 Corpufcles of tbediflblved body have 

 any little Cavities or pores fit to lodge 

 Aerial particles, or have afperous 

 furfaces, between whofe prominent 

 parts the generated air may conve- 

 niently lie 5 in fuch cafes^ I fay 5 thefe 

 Invifible bubbles may be Jookt upon, 

 as making with the (olid Corpufcles 

 they adhered to 5 little aggregates 

 much lighter in fpetie than the Cor- 

 pufcles thetjifelves would be 5 and 

 ppnfequently if the Precipitant con- 

 (ift of particles of fueh a fize and 

 (hape as are fit to expel thefe little 

 bubbles* and lodge themfelves in the 

 cavities pofleffed by them before, 

 there will be produced new aggre- 

 gates comppfed of the Corpufcles of 

 the diflblved bbdy and the particles 

 of the Precipitant 5 which aggregates 

 though tbey do take up very Tittle or 

 perhaps iiot at all more room ( take- 

 sng that word in a pppular fenfe) than 



fhofe^ 



