id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
33899	Wright, Russell Stuart	Optical Projection. Part 1: The Projection of Lantern Slides			.txt	text/plain	24587	1090	66	The most usual sizes of cylinders supplied for lantern exhibitions are jets, using coal gas from the ordinary supply, and oxygen from a cylinder. The electric current provides _the_ light for an optical lantern, though it current can pass than has been provided for, and in the case of an arc lamp optical lantern arc lamp in any case. THE ELECTRIC ARC.--We now come to _the_ light for optical lantern work, the and this 'feeding' in arc lamps for lantern work is usually done by hand, Take for instance an average hand-fed arc lamp as used for lantern work and as the continuous for lantern work with arc lamps: the light per ampère is an arc lamp, B the condenser, C the slide stage, and D the objective. Such a lantern is hardly suitable for a powerful arc lamp or limelight jet, use in moderate-sized halls, and a lantern of this general type is usually	./cache/33899.txt	./txt/33899.txt