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In lliort, from the foregoing obfervations in ap- 

 pears, that both in pubUc and private manufac- 

 tories, and various articles of rural oeconomy, a 

 multitude of operations are continually going on, 

 which undoubtedly depend on chemical principles. 

 It \jerc therefore earncftly to be wiflied, that an 

 accurate inquiry into the prefent ftate of the arts 

 throughout the kingdom were to be undertaken, 

 and repeated at certain intervals, with a view to- 

 wards their improvement. This would fupply 

 many curious and ufeful fads, which before were 

 not known, except in manufadorics. Chemiftry 

 in its turn would unfold the principles on which 

 the various operations arc founded, concerning 

 which even the artifts themfelvcs are generally ob- 

 fcrved to be grofsly ignorant. 



It fcems evident, that no material change can be 

 wrought in bodies, but either by feparating fome- 

 thing from them, or combining fomething with 

 them; but it is by chemical attraction, that both 

 reparation and combination are performed. Con- 

 fequently it is from the accurate knowledge of 

 chemical laws, that the cleareft lights, and ableft 

 affiftances, are to be obtained. 



Knowledge, fays the illuftrious Verulam, is in- 

 complete, and fcarcely deferves the name, unlefs 

 it enables us to explain the feveral phenomena. 



Is 



