Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 613
ora part of its length with No. 30 silk-covered wire, forming 59° EXPERIMENTAL SCIENCE. a small electro-magnet, whose armatvire, b, is attached to aspring forming a part of the back, and fastened at c to thewire forming the core of the magnet, by means of bindingwire and jewelers cement or sealing… … Electrical Dragon-Fly. in the flower pot. The other terminal of the magnet wireis connected with the vibrator spring at c. The free end of thevibrator spring extends from the armature, b, downward, andis provided with a platinum contact screw, d, which touchesthe contact spring, l\ the latter being…
Physics · Lantern projection · Electric apparatus and appliances
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