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on its cessation only induces a feeble electric current; the 
second, the intermediate or sluggish state, in which the 
metal is not polarised so as to be either attracted or 
repelled by the magnet, but in which there is, nevertheless, 
so great a molecular disturbance that very powerful electric 
currents are induced on its discontinuance; and the third, 
in which the particles are so polarised as to be repelled by 
the poles of the magnet which has induced such condition, 
but which last condition does not, on its discontinuance, 
induce powerful electric currents. 
I have not formed a decided opinion whether the attractive 
revulsion exhibited by a changeable metal, when the force 
which has induced in it the dia-magnetic condition has 
ceased, is due to the action of an electric current in the 
contrary direction to that which occurs on the change 
from the sluggish state ; or whether the particles of metal, 
in assuming their normal condition pass through the mag- 
netic state, and are then attracted. 
I leave the consideration, by what scheme or arrange- 
ment of particles such three conditions of matter and their 
polarities may be accounted for, as subjects for future 
investigation. 
