30 Repulfion. [Book I. 



This principle of repulfion has, however, been dif- 

 putcd by fome late philofophers ; and all thefe efFe6ts 

 have been accounted for by them, by fuppofing, not 

 that there exifts a pofitive principle of repulfion in the 

 water, the oil, &c. but: that the attraction of the leaf, 

 of the water, &c. for the contiguous bodies, is not fuf- 

 ficient to deftroy the attraction which the particles of 

 homogeneous fluids poflefs for each other. 



The repulfion of magnetifm and electricity, will be 

 treaced of in thofe parts of the work which are appro- 

 priated to thefe fubjects. 



