. Appleton's dictionary of machines, mechanics, engine-work, and engineering. the power by which itwould be deflected with a single current only, as in Fig. 2688. If we imagine the wire z d c to be several times turned longitudinally about the needle, as in , then the effect would be still further increased; it would, in fact, become multiplied in proportionto the number of turns of the wire, which would represent so many additional currents. It k onlyrequisite to cover the wire with silk thread, or some other imperfect or non-conducting matter, so asto avoid metallic communication bet
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. the power by which itwould be deflected with a single current only, as in Fig. 2688. If we imagine the wire z d c to be several times turned longitudinally about the needle, as in , then the effect would be still further increased; it would, in fact, become multiplied in proportionto the number of turns of the wire, which would represent so many additional currents. It k onlyrequisite to cover the wire with silk thread, or some other imperfect or non-conducting matter, so asto avoid metallic communication between the coils, and oblige the current to traverse the whole lengthof the wire. This is the principle upon which the electro-magnetic multiplier rests, and the delicacy ofthe effect is such that the needle will become deflected by the immersion of two pieces of zinc andplatinum wire less than Jth of an inch long, and j^-th of an inch in diameter, in water slightly acidu-lated. Fig. 2694 represents this instrument under one of its most perfect and delicate forms. Two
Size: 2320px × 1077px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
