Faraday as a Discoverer. 
of its bed. The intentness of his vision in any direction did not . 
apparently diminish his power of perception in other directions; 
and when he attacked a subject, expecting results, he had the 
faculty of keeping his mind alert, so that results different from 
those which he expected should not escape him through pre 
occupation. 
e began his experiments ‘‘on the induction of electric cu 
rents” by composing a helix of two insulated wires, which 
were wound side by side round the same wooden cylinder. One 
of these wires he connected with a voltaic battery of ten cells, 
and the other with a sensitive galvanometer. When connet- 
tion with the battery was made, and while the current flowed, — 
no effect whatever was observed at the galvanometer. But he 
it the utmost power at his command. He raised his battery 
from 10 cells to 120 cells, but without avail, The current 
red at the moment when he made cont + with the battery; 
that the needle would afterward ea 
This result and others of a similar kind led him to the com 
: current through the one wire did m 
ty induce a similar current through the other; but that i 
continued for an instant only, and partook more of the nature 
The momentary currents thus 
nerated were called induced currents, while she cnarestt which 
generated them was called th. nducing current. It was 1 
8 sed in directi : 
that developed on ih Troha ar then to its generator, W 
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