CLOSED CIRCUITS IN SPHERES, ETC. 



The polarity of a body may be determined by 

 IN the molecular polarizations; 

 which neutralize each other 

 >s when alternately arranged, or 

 co-operate when combined ; as 

 >s in the two parts of Fig. 47. 

 is The polar action and the dia- 

 magnetic action induced by 

 electric excitation between molecules, sustains 

 t.he continuous union of the particles, laterally 

 and longitudinally, about spherical rain-drops, 

 and in the tenuous film of bubbles, while their 

 contact facilitates the circulation of electric cur- 

 rents in closed circuits around the spheres ; as 

 represented in Fig. 43, p. 126. 



While the external closed circuits develop elec- 

 tric attraction between 

 the adjacent sides of 

 two bubbles, A B, by 

 moving in similar di- 

 rections, the opposite 

 directions of the inte- 

 rior closed circuits may 

 produce reciprocal re- 

 pulsion, and bulge out the sides of bubbles to 

 spheres. 



The similar circulation of electric currents in 

 closed circuits is not limited to the reciprocal ac- 

 tion and reaction between molecules on a minute 

 scale, in terrestrial mechanics ; but is extended on 



Fig. 48. 



