The American journal of science and arts . galvanic battery, the magnet will be thrown at right angles to thecoil by tangential action of the current; when it reaches thispoint, the pin E upon the magnet C D moves a lever which turnsan apparatus for reversing the current in the coil. The motion inthe magnet is then continued until it reaches a half revolution,when the pin E moves the lever in the opposite direction, andchanging the direction of the current again, the magnet is im-pelled as at first. The motions of this magnet were rapid, beingabout one hundred and twenty revolutions in a minut
The American journal of science and arts . galvanic battery, the magnet will be thrown at right angles to thecoil by tangential action of the current; when it reaches thispoint, the pin E upon the magnet C D moves a lever which turnsan apparatus for reversing the current in the coil. The motion inthe magnet is then continued until it reaches a half revolution,when the pin E moves the lever in the opposite direction, andchanging the direction of the current again, the magnet is im-pelled as at first. The motions of this magnet were rapid, beingabout one hundred and twenty revolutions in a minute, althoughweighing six pounds, and would continue half an hour withoutmuch diminution with the same charge of the battery. Fig. 2, represents an apparatus by means of which the ribbonmay be made to revolve around the magnet. Let A B represent Figure a galvanic magnet suspended upon an axis G. The wires E F,are the extremities of the wire which is wound around the mag-net, and which pass through a copper tube which serves as anaxis for the revolving part of the apparatus. These wires are^ Electro-Magnetic Rotations. 131 first well covered with silk so as completely to insulate them fromeach other, and from the tube. A stout iron wire firmly rivetedto the magnet passes through the tube and being fastened to theframe by a screw serves to suspend the magnet. The ribbon CD is wound over a thin frame of wood and each extremity sold-ered to a semicircular strip of copper, forming when applied tothe lower axis, a pole changer similar to those of Dr. Page, thispole changer is placed so as to change the direction of the cur-rent in the revolving ribbon when it is at right angles to themagnet. The extremities of the wires E F press upon the se-micircular strips of copper, and thus when a communication ismade between each of these wires, and
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Keywords: ., bo, bookcentury1800, bookpublishernewhavensconverse, bookyear1820
