ELECTIVE ATTRACTION. 



florescence, and from the compounded 

 nature of the principles themselves, the 

 state of saturation, the effect of heat, &c. 

 These variable considerations must ne- 

 cessarily render all tables of the effects 

 of attraction inapplicable, excepting with 

 allowances; but they may nevertheless 

 be considered as exhibiting very valuable 

 summaries of facts. A like uncertainty 

 must be considered as belonging to all 

 numerical or other inferences, of the re- 

 lative energies of the elective attractions; 

 for determining which, it must be con- 

 fessed, our means are far from being ade- 

 quate, even if we were fully acquainted 

 with the disturbances to which it is pro- 

 bable they are subject from the Galvanic 

 action. See GALVANISM. 



Tables I. to VI. contain in substance the 

 two tables of Attractiones Electivx Sim- 

 plices, placed at the end of Bergman's 

 treatise upon elective attractions, with 

 such corrections and additions as subse- 

 quent discoveries have rendered neces- 

 sary. These tables require no other ex- 

 planation, than that the substances enu- 

 merated are considered to be simple, as 

 far as relates to the facts exhibited in 

 these sketches. The order of position 

 denotes, that the higher any substance 

 stands in any column, the stronger is its 

 elective attraction to the substance at the 

 head of that column. The under part of 

 each table exhibits the attractions in the 

 dry way, and must be considered as en- 

 tirely distinct from the upper part. 



