PHYSICAL AND LITERARY. 381 



But the fpirit of fea fak may likewife be 

 (diilodged by the acids of vitriol or nitre. 



In mofl folutions, precipitations, and 

 other operations by which the texture of 

 bodies are much changed, there are fome 

 appearances, fuch as an expanfion and 

 bubbling, the produdion of an elaftic 

 fluid like air, and a commotion fo great, 

 as to produce fome remarkable degree of 

 heat, and in fome cafes fmoak and flame : 

 Which appearances, I fay, plainly difeo- 

 yer, that the finall particles of bodies are 

 endowed with fome very a(5live powers, 

 capable to introduce certain motions tend- 

 ing to union or disjunclion, attradion or 

 fepulfion. 



That many parts of matter are en- 

 jdowed with an attractive power tending 

 to union and cohefion, may be deduced 

 from the inftances already mentioned : 

 And many more might be brought, from 

 occurrences in chemiflry, to confirm the 

 fame. That other parts of matter are 

 isndowed with an elaftic or repelling force, 

 may be concluded from the properties of 

 air and light, demonftrated by the great- 



• ea 



