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current | 13:29, 6 August 2019 | 3,276 × 2,668, 2 pages (25.07 MB) | Mary Mark Ockerbloom | == {{int:filedesc}} == {{Photograph |photographer ={{unknown}} |title = Photograph of Beckman Model DB Spectrophotometer |description = Photograph of Beckman Model DB Spectrophotometer The Beckman DB was a double beam model, made by Beckman Instruments, which allowed for comparison between two light paths: a reference and the sample being measured. Published without a copyright notice in Beckman Instruments ''Feedback'' newsletter, April 1960 (box 44, folder 34)... |
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Original file (3,276 × 2,668 pixels, file size: 25.07 MB, MIME type: image/tiff, 2 pages)
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 13:29, 6 August 2019 | 3,276 × 2,668, 2 pages (25.07 MB) | Mary Mark Ockerbloom | == {{int:filedesc}} == {{Photograph |photographer ={{unknown}} |title = Photograph of Beckman Model DB Spectrophotometer |description = Photograph of Beckman Model DB Spectrophotometer The Beckman DB was a double beam model, made by Beckman Instruments, which allowed for comparison between two light paths: a reference and the sample being measured. Published without a copyright notice in Beckman Instruments ''Feedback'' newsletter, April 1960 (box 44, folder 34)... |
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