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Printing Silks

Old Hand-Block Printing Contrasted With Present Expensive Power Machines

Light and Organisms

Orienting Effects of Monochromatic Light on Fucus Spores and Rhyzoids

By Annie May Hurd

Copying Fingerprints—I

New Methods for “Lifting” or Transferring Fingerprints on Objects by Prepared Paper or Foils

By Robert de R*amp*eacute;sillac-Ros*amp*eacute;


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    September 13, 1919

    See the World from a Different Perspective

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