File:AmCyc Boring - drill bit - screw auger (1).jpg

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AmCyc_Boring_-_drill_bit_-_screw_auger_(1).jpg ‎(82 × 563 pixels, file size: 16 KB, MIME type: image/jpeg)

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Description
English: Woodcut/drawing of a drill bit for wood in the form of a screw: the screw auger (first version), formed of a flat band of steel twisted when red hot.
Date published 1879
Source The American Cyclopædia, v. 3, 1879, p. 99 (Fig. 14).
Author Unknown authorUnknown author
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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
United States
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current17:34, 25 March 2014Thumbnail for version as of 17:34, 25 March 201482 × 563 (16 KB)Library Guy (talk | contribs){{Information |Description ={{en|1=Woodcut/drawing of a drill bit for wood in the form of a screw: the screw auger (first version), formed of a flat band of steel twisted when red hot.}} |Source =''The American Cyclopædia'', v. 3, 1879, p....

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