File:Ritchies Photometer.png

Ritchies_Photometer.png (404 × 296 pixels, file size: 55 KB, MIME type: image/png)

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Description
English: Ritchie's Photometer
Date
Source 1861 chem textbook
Author Draper

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Public domain
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United States
United States
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2 October 2013

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Date/TimeThumbnailDimensionsUserComment
current20:39, 2 October 2013Thumbnail for version as of 20:39, 2 October 2013404 × 296 (55 KB)J1812User created page with UploadWizard

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