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

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Original file ‎(296 × 608 pixels, file size: 55 KB, MIME type: image/jpeg)

Description
English: Woodcut/drawing of a diamond drill bit, the invention of Rodolphe Leschot of Paris.
Date published 1879
Source The American Cyclopædia, v. 3, 1879, p. 101 (Fig. 22).
Author unknown artist; the bit is the invention of Rodolphe Leschot of Paris
Permission
(Reusing this file)
Public domain
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
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.

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drill bit

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image/jpeg

checksum

21f5c2815795fcf5d6388447fb3a216f421f8c89

determination method: SHA-1

data size

56,742 byte

height

608 pixel

width

296 pixel

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Date/TimeThumbnailDimensionsUserComment
current19:29, 25 March 2014Thumbnail for version as of 19:29, 25 March 2014296 × 608 (55 KB)Library Guy{{Information |Description ={{en|1=Woodcut/drawing of a diamond drill bit, the invention of Rodolphe Leschot of Paris.}} |Source =''The American Cyclopædia'', v. 3, 1879, p. 101 (Fig. 22). |Author =unknown artist; the bit is the inv...

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