W. A. Norton on Molecuiar and Oosmical Physics. 31 
repulsion from the upper limit. In the memoir refe 
of matter, and the outer 
force of vapors and gases. e 
may receive is a distinct force of repulsion, modifying the 
Origin of Chemical Attraction, and of Electric and Magnetic 
Forces.—The electric envelopes of atoms, besides being the source 
of the molecular forces, hckatinng the primary heat-repulsion, 
invests the molecules of each substance with’ the property o: 
chemical attraction for the molecules of other substances to 
which they bear a certain physical relation. This consists in 
to the origination and maintenance of currents in the adjacent 
inequalities of elastic force in this moving mass of ether, from 
which result transverse currents. ‘These transverse currents take 
effect upon the line of the electric or magnetic current because 
they are partially intercepted by it. The induction of one elec- 
tric or magnetic current by another, is effected by the interven- 
tion of currents directly induced in the adjacent body of 
luminiferous ether. , a of 
_ The key to the explanation of the excitation of electricity 
__ by friction lies in the fact made out in my former paper, that 
