This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 Excerpt: ...Brook, N. J. sent to this department an amazing variety of birds and "wee beasties," from snapping turtles to lapwings. The reports also speak of a series of photographs "showing the Black-bellied Tarantula Spider in her home and the life history of the Field Cricket... of extraordinary interest." In the Technical ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 Excerpt: ...Brook, N. J. sent to this department an amazing variety of birds and "wee beasties," from snapping turtles to lapwings. The reports also speak of a series of photographs "showing the Black-bellied Tarantula Spider in her home and the life history of the Field Cricket... of extraordinary interest." In the Technical Applications Section the Research Laboratory of the Eastman Kodak Company, Rochester, N. Y., the Carnegie Institution, the Smithsonian Institution and the Bureau of Standards, Washington, D. C. were well represented by the results of studies in photographic problems. Passport forgeries, panoramic photography and many other industrial uses of photography also found place in this Section. The Color Print Section displayed about 26 prints by the Raydex, Raydex Ozobrome and three-color carbon methods. They are spoken of as interesting but not convincing. The color transparencies and color lantern slides were either Paget or Autochrome, the latter predominating. John G. Capstaff sent an exhibit of motion pictures in colors, by the Kodachrome process, which is described as very satisfying. Rex B. Wilsey exhibited a number of radiographs illustrating the great usefulness of the Potter-Bucky diaphragm (a grid made up of parallel strips of lead foil, placed between the patient and the film) in preventing scatter radiation from reaching the film, and thus ensuring better definition, detail and contrast. Other interesting radiographs were shown by N. E. Luboshez, made on Eastman Dupli-Tized Film and clearly showing the advance in practice made possible by this wonderful film product. Perhaps the most interesting individual exhibit in any section was that sent by J. Dudley Johnston, an English amateur, to the lantern slides section. This c...
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