222 W. A. Norton on Molecular Physics. 
forces, under special circumstances, or by an inequality in the 
action of the pulses of heat upon the atmospheres of the mole- 
cul The current consists of an actual flow of electric ether 
from molecule to molecule, determined by a previous electric 
polarization propagated from that which’ is the source of the 
current. ‘I'here are also conveyed in the direction of the posi- 
tive current, streams of impulses, both by the electric, and uni- 
versal ether, which, by a partial lateral dispersion, produce the 
magnetic effects of the current. 
e mutual attractions, or repulsions, exerted between two 
electric currents may be ascribed to a change in the tension of 
the ether between the wires, produced by the lateral actions of 
the currents. 
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a portion of its heat from this source. If this be true the re 
markable formal relations that subsist between the magnetism 
and heat of the earth, are probably the result, in a great degree, 
__ 9f this physical bond by which the two principles are partially 
oe ~ nn ag investigation, by the author, of these oe 
__ in an article on Terrestrial Magnetism, published in vol. iv, 8€¢- 
“ond series of this Journal). bas 
