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the disturbance of the particles not engaged in the actual 
conduction of the current is a kind of polarity continuing 
during the uniform transmission of the current through the 
adjacent conductor. I consider that such polarity either 
is or is not accompanied by a molecular disturbance of the 
particles of the body; and also that when such polarity 
ceases, another molecular disturbance again takes place, 
the particles returning to their normal condition. Such 
molecular disturbances, according to my hypothesis, occa- 
sion electrical currents, if they occur in bodies favouring 
the circulation of such currents, that is, in conductors. 
Thus I conceive that I can explain how a current, at the 
moment it is established, or during such period as its force 
is increasing, induces a current in an adjacent conductor; 
not by direct induction, for direct induction should produce 
a continuing current, but that the particles being polarised, 
or being subjected to a molecular disturbance, induce a 
secondary current during such period as the disturbance 
is being effected ; and that the molecular disturbance having 
attained a maximum, the secondary current ceases ; that 
when the primary current ceases or declines, the polarised 
atoms regain their former condition, such change being also 
in the nature of a molecular disturbance, which induces a se- 
condary current in the opposite direction to that first induced. 
To apply such hypothesis to the explanation of magnetic 
phenomena, it may be assumed that such polarity is pro- 
duced ; that in each particle the ponderable atoms are 
unequally distributed with regard to the imponderable, 
(still disregarding the consideration whether such impon- 
derable be material, or be vibratory, or a mere condition 
of force), and that such polarity is the cause of attraction 
or repulsion according to the direction in which such polar- 
ised atoms, in two bodies, are presented to each other. 
In electro-magnets, I conceive that such molecular dis- 
