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English: Promotional card for the Robertson screw, which promotes the invention as the most recent advancement on Archimedes' screw
|Author||Library and Archives Canada, Collections Canada website; from Ken Lamb (1998), P.L., inventor of the Robertson screw, Milton Historical Society. ISBN 0969562969.; original illustration Peter L. Robertson, 1909|
(Reusing this file)
The immediate source, the Collections Canada website, notes that this is in the public domain, but includes an apparently non-binding request for conditions of its reuse:] “Library and Archives Canada is identified as the source; You exercise due diligence in ensuring the accuracy of the material reproduced; You do not manipulate and/or modify the material reproduced; and The reproduction is not represented as an official version of the material reproduced or as having been made in affiliation with, or with the endorsement of, Library and Archives Canada.”
|Orientation of image||1|
|Image resolution in width direction||150|
|Image resolution in height direction||150|
|Unit of X and Y resolution||2|
|Color space information||65535|
|Exif image width||600|
|Exif image length||363|
|Software used||Adobe Photoshop CS Windows|
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