236 Dr. Hare on the Theories of Electrical Phenomena. 
have to turn in different directions, like interlocking cog-wheels 
in machinery. But in that case, if magnetism be due to currents, 
the magneto-inductive influence of one set would neutralize that 
of the other. Again, how can a current, excited by a battery in 
one circuitous conductor, cause, by dynamic induction, a current 
in the opposite direction, through another conductor parallel to the 
first, but insulated therefrom? How can a current of quantity in 
a ribbon coil,* give rise to one of intensity in a coil of fine wire, 
rushing of course with a velocity commensurate with the inten- 
sity thus imparted ? 
. From the preceding considerations, and others which will 
be stated, it follows, that it has been erroneously inferred that the 
only difference between galvanic and frictional electricity is de- 
dendent on quantity and intensity. It must be evident that there 
is a diversity in the nature of these affections of matter, sufficient 
to create a line of demarcation between them. 
5. Having stated my objections to the electrical theories here- 
tofore advanced, it may be proper that I should suggest any hypo- 
thetical views which may appear to me of a character to amend or 
to supersede those to which I have objected. But however I may 
have been emboldened to point out defects which have appeared 
to me to be inherent in the theories heretofore accredited, I am 
far from presuming to devise any substitute which will be unob- 
jectionable. I am fully aware that there is an obscurity as re- 
spects the nature and mutual influence of chemical affinity, heat, 
light, electricity, magnetism and vitality, which science can only 
to a minute extent dispel. 
26. The hypothesis which I now deem preferable, is so much 
indebted to the researches and suggestions of Faraday and others, 
that, were it true, I could claim for myself but a small share of 
the merit of its origmation. That sagacious electrician employs 
the following language: “ In the long continued course of exper- 
imental inquiry, in which I have been engaged, this general re- 
sult has pressed upon me constantly, namely, the necessity of ad- 
mitting two forces or directions of force combined with the impos- 
sibility of separating these two forces or electricities from each 
her.” —Experimental Researches, 1163. 
27. Subsequently (1244) after citing another proof of the in- 
separability of the two electric forces, he alleges it to be “ another 
argument in favor of the view that induction and its concomi- 
tant phenomena depend upon a polarity of the particles of matter !” 
(To be continued.) 
A 
* Compendium, Electro-magnetism, paragraph 784. 
