Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 676
LANTERN PROJECTION. 053 The spur pinion carries an adjustable crank, the pin ofwhich turns in the cranic arm, and is apertured transverselyto receive the tracing rod, which may be clamped thereinby the thumb screw. The tracing- rod passes through a stud arranged to turnin the end of the movable arm… … Tracings produced by the Cycloidotrope. its extremity with a steel tracing point. A wire passingthrough the hollow tracing rod engages the under side ofthe curved spring, and lifts the point from the glass. The glass is prepared for tracing by smoking it over acandle, lamp, or gas jet, or, better,…
Physics · Lantern projection · Electric apparatus and appliances
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![An illustration from Cosmographia in qvatvor libros distribvta summo ordine, miraqve facilitate, ac breuitate ad magnam Ptolemæi mathematicam constructionem, ad vniuersamque astrologiam institutens. Francisco Barocio ... avtore. Cum præfatione eiusdem autoris, in qua perfecta quidem astrologiæ diuisio, & enarratio autorum illustrium, & voluminum ab eis conscriptorum in singulis astrologiæ partibus habetur: Joannis de Sacrobosco verò 84 errores, et alij permulti suorum expositorum, & sectatorum ostenduntur. rationibusq[uam] redarguuntur. Præcesserunt etiam quædam communia mathematica, necnon arithmetica, & geometrica principia, nonnullæq[uam] propositiones, de quibus in toto opere sæpe fit mentio: ac demum locupletissimus index eorum, quæ ipsa Cosmographia continentur .. (1585)](https://img.insideoutlibrary.com/img/200/ia-cosmographiainqv00baro-270-85.webp)
