4$ imperfection of tt>e Cfjpmfll^ 



fhews not to be devoid of weighty 

 muft be fuppofed to abound witb 

 Earthy particles, and yet this fpiri- 

 tuous liquor may in a trice become 

 Flame,which they would have to be 

 the lighteft body in the world 



But, la enlarge on this fubjeft p 

 would be to 'forget,- that the defign 

 of this Traft engages me to deal not 

 with the Peripatetic School, but the 

 SpagyricaL To which I (ball there- 

 fore return 9 and give you this ad- 

 veriifement. about it 5 that* what I 

 have hitherto obje&ed is meant a- 

 gainft the more common and receiv- 

 ed Doftrine about the Material Prin- 

 ciples of bodies reputed mixt, as 'tis 

 wont by vulgar Chymifts to be ap- 

 plied to the rendring an account of 

 the Qualities of fubftances Corpo- 

 real j and therefore I pretend not 5 

 that the part objeftions flbould con- 

 clude againlt other Chymical Theo- 

 ries than that which I was concern- 

 ed to queftion. And if adept Philo* 

 fo^hers, (fuppofing there be fuch) or 



any 



