214 Description of a Magnetic Electrical Machine. 
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tion which must necessarily be occasioned by the attachment of the 
rotating apparatus to the battery itself. D is the intensity armature, 
which screws into a brass mandril seated between the poles of the 
battery A; motion being communicated to it by the multiplying 
wheel E. This armature has two coils of fine insulated copper wire, 
one thousand five hundred yards long, coiled on its cylinders, the 
commencement of each coil being soldered to the armature D, from 
which projects a brass stem, (also soldered mto D,) which carries 
the break-pieces, H and H. The break-piece is made fast in what 
position soever is required by a small binding screw. K and K, a 
hollow brass cylinder, to which the terminations of the coils F G 
are soldered, being insulated by a piece of hard wood attached to 
the brass stem. O and O are iron wire springs, pressing against the 
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