Introductory Course of Natural Philosophy for the Use of Schools And
The book Introductory Course of Natural Philosophy for the Use of Schools And was written by author A Adolphe Ganot Here you can read free online of Introductory Course of Natural Philosophy for the Use of Schools And book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Introductory Course of Natural Philosophy for the Use of Schools And a good or bad book?
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The Polyrama and Dissolving Views. 330. The POLYRAMA consists of a double magic lantern, with two cut-off screens. DISSOLVING VIEWS are obtained by using both lanterns. Thus, if a picture of a daylight scene be painted on one of the slides, and of the same scene by moonlight be painted on the other, the first picture is thrown upon the screen, strongly illuminated, the other one being entirely excluded by a screen that cuts off the second lens. By an arrangement operated by the exhibitor, the l...ight is gradually cut off from the first picture and ad- mitted upon the second, the first fading away insensibly, whilst the second as gradually grows brighter. In this way all the effects intermediate between full daylight and full moonlight may be obtained in succession. A volcano, calm, and only surmounted by a light cloud of smoke, may be followed by a picture of the same volcano sending forth volumes of flame and smoke. A storm may be made to succeed a smiling landscape, and so on ; the illusion is complete.
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