Optic projection : principles, installation and use of the magic lantern, projection microscope, reflecting lantern, moving picture machine, fully illustrated with plates and with over 400 text-figures (1914)

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MAGIC LANTERN WITH PETROLEUM LAMP [Cn. V FIG. 65. MARCY'S MAGIC LANTERN OR "SCIOPTICON" WITH A MULTIPLE-WICK, PETROLEUM LAMP. (From Dolbear's Art of Projecting). a-b. c-d The lenses of the projection objective. p-q The condenser lenses. Z S The oil reservoir of the lamp. E The flames of the lamp with their edges toward the condenser. G-G Two glass plates at opposite ends of the lamp-house to allow the light to pass to the condenser, and so that the reflector II can return the backward extending light. C I J The chimney and ventilator of the lamp-house. W W At the right, the milled heads for turning the lamp-wicks up or down. There is a common reservoir and a common chimney, but each wick has a separate burner and a separate mechanism for raising and lowering the wick. § 197. Chimney and reflector. — There is a common chimney. This is usually of metal with a window on opposite sides, and with either a telescoping extension or a segment which can be put on top