File:Motion picture electricity (1914) (14597409329).jpg

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English:

Identifier: motionpictureele00hall (find matches)
Title: Motion picture electricity
Year: 1914 (1910s)
Authors: Hallberg, Josef Henrik, 1874-
Subjects: Motion picture theaters Electric lighting
Publisher: New York city, The Moving picture world
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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About This Book: Catalog Entry
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illu-mination in the direction of the condensing lenses, but thenet result is practically no better than from carbon set-tings illustrated in Figs. 100 and 103. This statement may seem unreasonable to many, butwhen the reader takes into account the point that the con-densing lenses of a projector arc lamp bring into focuson the spot at the aperture plate an exact imageof the craters, it is easy to understand that therewill be a very brilliant spot on the upper part of theaperture from the lower crater and another brilliantspot on the lower part of the aperture from the uppercrater, but right in the center there will be a purple orviolet streak which represents the arc which is not backedup by a crater, but which is in front of the air space be-tween the rear part of the upper and lower craters. Having mastered the foregoing argument, you willreadily understand that in order to focus both craters inFigs. 105 and 106 it would be necessary to bring the rear 182 MOTION PICTURE ELECTRICITY
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Flickr tags
InfoField
  • bookid:motionpictureele00hall
  • bookyear:1914
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:Hallberg__Josef_Henrik__1874_
  • booksubject:Motion_picture_theaters
  • booksubject:Electric_lighting
  • bookpublisher:New_York_city__The_Moving_picture_world
  • bookcontributor:The_Library_of_Congress
  • booksponsor:The_Library_of_Congress
  • bookleafnumber:189
  • bookcollection:library_of_congress
  • bookcollection:americana
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30 July 2014
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