3 44 Recapitulation of Doctrines and Fafts. [ Book I V, 



Glafs, though it electrifies very well by friction, 

 electrifies alfo by communication, even without any 

 preliminary preparation ; yet it is very proper to infu- 

 late. 



Electrical phenomena are not produced entirely from 

 the bodies upon which the electrifying machine acts ; 

 the adjacent bodies or fubftances contribute towards 

 their production. 



The energy of the electric virtue is augmented, ii 

 conductors, more by an increafe of furface, than by an 

 augmentation of the mafs. 



Electrified bodies adhere one to another, fo that they 

 cannot be feparated without a confiderable effort, as 

 was, exemplified in the cafe of two filk ftockings of va- 

 rious colours. 



Electricity accej/srates the evaporation of liquors, and 

 the perfpiration of animals. 



The pencils or tufts of light, whicfi are feen at the 

 .extremities or angles of electrified bodies, are always 

 compofed of divergent rays when they pafs in the air; 

 but if a non-eleffrif or conducting body is prefented to 

 them, they lofe a great deal of their divergency j their 

 rays fometimes become even convergent, in order that 

 they may approach towards that body which is more 

 permeable than the air ; and if they are made to pafs into 

 a vacuum, they will afliime the form of a large branch 

 of light nearly cylindrical, or in the form of a fpindle. 



The fpark which fhines between two bodies is ca- 

 pable of fetting combuftible matters on fire. 



