Living pictures; their history, photoproduction and practical workingWith a digest of British patents and annotated bibliography . nterspersed with air-passages, wouldgive rise to a conflagration so sudden and so energetic as to almost equalan explosion. It willtherefore be seen thatthe enclosure of loosefilm is an absoluteduty. As regards therisk of lighting thefilm by the heat ofthe lantern, it is usualto interpose an alum-trough (Fig. 237), as in photo-micrographic work, where a large number of rays areconcentrated on a small object. Glycerine has alsobeen suggested as an exceptionally effe
Living pictures; their history, photoproduction and practical workingWith a digest of British patents and annotated bibliography . nterspersed with air-passages, wouldgive rise to a conflagration so sudden and so energetic as to almost equalan explosion. It willtherefore be seen thatthe enclosure of loosefilm is an absoluteduty. As regards therisk of lighting thefilm by the heat ofthe lantern, it is usualto interpose an alum-trough (Fig. 237), as in photo-micrographic work, where a large number of rays areconcentrated on a small object. Glycerine has alsobeen suggested as an exceptionally effective heat-absorbent. In addition the suggestion has been madeinvolving the employment of a shutter covering thecondenser, to be lifted when the film commences itsmotion, and dropped so soon as the end is shutter might be pierced in order to give sufficientlight for the adjustment of the film. Messrs. Lumierehave introduced an ingenious condenser, which servesat the same time to absorb the heat-rays. It will beseen from Fig. 238 that a spherical flask of water isused as a condenser, a small piece of carbon being. Fig. 237. EXHIBITING. 217 suspended therein to draw off the gases set free by thegradual heating of the contained water. In addition a
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectmotionpictures
