28 Eeflectton«upnt|)etoot|)efijsf 



and Acidum do not ,in my apprehenfi- 

 on, perform what may be juftly ex- 

 pedfced from Philofophical Explicati- 

 ons. 'Tis faid indeed, that the Acidum 

 Working on the Alcali^ or this upon 

 that, produces the effeft propofed} 

 but that is only to tell us, what is the 

 Agent that operates,and not tbeMan- 

 neroF the operation, or the means 

 and procefs whereby it produces the 

 effeft propofed, and 'tis this modus 

 that Inquifitive Naturalifts chiefly 

 defire to learn. And if it be faid, that 

 it is by the mutual hoftility of the 

 Principles that the effe&is produced, 

 it may be anfwered, that befides, that 

 that hoftility it felf is not, as we have 

 juft now obferved,a thing clear, if fo 

 mucha s Intelligible > this is fo gene- 

 ral and indeterminate a way of expli- 

 cating things,as can afford little or no 

 fatisfa&ion to a fearching and cauti- 

 ous Naturalift,that confiders how ve- 

 ry numerous and very various the 

 Thanomena of Qualities are, 



CHAP. 



