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File:The Science record; a compendium of scientific progress and discovery (1874) (14759260766).jpg

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Identifier: sciencerecordcom1874beac (find matches)
Title: The Science record; a compendium of scientific progress and discovery
Year: 1872 (1870s)
Authors: Beach, Alfred Ely, 1826-1896
Subjects: Technology Industrial arts
Publisher: New York, Munn
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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DIAMOND-CUTTING IN NEW-YORK.—THE CUTTER OR SNYDER. him, the operator placed one of his knives directly overthe cleft. The knife used was nothing more than a pieceof steel, perfectly flat, with a square edge, and about sixinches long. It is ground blunt purposely, for if it werekeen, the hard stone would quickly turn the edge. Tap- 92 SCIENCE RECORD.
Text Appearing After Image:
DIAMOND-CUTTING IN NEW-YORK.—THE SETTER. ping the back of the blade lightly with his iron rod, theartist split off a fragment, and then, melting his cementand removing the parts, showed us a clean smooth cut.(See Fig. 4.) But is not this a very risky performance? we almostinvoluntarily exclaimed. Suppose that you make a mis-take ? The workman smiled superior, and explained thatsuch is hardly possible, though he admitted that it wouldbe a very easy matter to halve the value of a gem by asingle false stroke. Imagine a $5000 diamond—and thatis not a large one—thus treated ; $2500 irretrievably lostby a single tap of the hammer! But then, with good-sizedstones, the work does not seem so difficult as with jewelsno larger than pin-heads, so small indeed that, in somecases, they number as many as 300 to the carat in the

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Volume
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1874
Flickr tags
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  • bookid:sciencerecordcom1874beac
  • bookyear:1872
  • bookdecade:1870
  • bookcentury:1800
  • bookauthor:Beach__Alfred_Ely__1826_1896
  • booksubject:Technology
  • booksubject:Industrial_arts
  • bookpublisher:New_York__Munn
  • bookcontributor:Smithsonian_Libraries
  • booksponsor:Smithsonian_Libraries
  • bookleafnumber:97
  • bookcollection:smithsonian
Flickr posted date
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30 July 2014
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This image was originally posted to Flickr by Internet Archive Book Images at https://flickr.com/photos/126377022@N07/14759260766. It was reviewed on 13 October 2015 by FlickreviewR and was confirmed to be licensed under the terms of the No known copyright restrictions.

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