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File:AmCyc Boring - drill bit - centre bit.jpg

AmCyc_Boring_-_drill_bit_-_centre_bit.jpg ‎(163 × 433 pixels, file size: 20 KB, MIME type: image/jpeg)

Description
English: Woodcut/drawing of a drill bit for wood, the centre bit, an instrument of English invention, consists of a centre point, a shearing point, and a broad inclined cutter.
Date published 1879
Source The American Cyclopædia, v. 3, 1879, p. 99 (Fig. 11).
Author Unknown authorUnknown author
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Public domain
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
United States
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drill bit

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Date/TimeThumbnailDimensionsUserComment
current17:11, 25 March 2014Thumbnail for version as of 17:11, 25 March 2014163 × 433 (20 KB)Library Guy{{Information |Description ={{en|1=Woodcut/drawing of a drill bit for wood, the centre bit, an instrument of English invention, consists of a centre point, a shearing point, and a broad inclined cutter.}} |Source =''The American Cyclopædia'...

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