File:Pyrometer example.png

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Pyrometer_example.png ‎(349 × 256 pixels, file size: 22 KB, MIME type: image/png)

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Description
English: Early pyrometer measuring the coefficient of expansion of a metal bar, from a 19th century chemistry textbook The metal bar (a) expands when heated by the lamps (f) and presses against a lever (b), which moves a pointer (c) along a scale that serves as a measuring index. (e) is an immovable prop which holds the bar in place. A spring on (c) pushes against (b), causing the index to fall back once the bar cools.
Date
Source A Textbook on Chemistry, 1852
Author John Draper

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United States
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current00:20, 23 August 2013Thumbnail for version as of 00:20, 23 August 2013349 × 256 (22 KB)J1812 (talk | contribs)User created page with UploadWizard

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