Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 34
from a circularpath. This railway is madein the same manner asthe swiftest descent ap-paratus described on another page. Two wiresare bent into spiral loopsaround a cylinder, andthe extremities are curv-ed upwardly as shown.The two curved wires areconnected together bycurved wire cross pieces… … Spiral Railway. 12 EXPERIMENTAL SCIENCE. height of the higher end of the railway is to the height ofthe circular part in a greater ratio than 5 to 4. A ball started at the higher end of the railway followsthe track to the opposite end, and at one point in its travelit is held by centrifugal force…
Physics · Lantern projection · Electric apparatus and appliances
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