File:Beckman model db n009w2543.tiff
此TIF文件的JPG预览的大小：736 × 599像素。 其他分辨率：295 × 240像素 | 589 × 480像素 | 943 × 768像素 | 1,257 × 1,024像素 | 2,515 × 2,048像素 | 3,276 × 2,668像素。
原始文件 （3,276 × 2,668像素，文件大小：25.07 MB，MIME类型：image/tiff，2页）
摘要
Photograph of Beckman Model DB Spectrophotometer
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未知 |
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| 标题 |
Photograph of Beckman Model DB Spectrophotometer |
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| 描述 |
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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| 日期 | 1960年 | ||||||||||||||||||||
| 藏于 |
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| 登录号 |
Beckman Historical Collection |
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| 荣誉行 | Science History Institute. | ||||||||||||||||||||
| 备注 | Image downloaded with permission from the Science History Institute, as part of the Wikipedian in Residence initiative. | ||||||||||||||||||||
| 来源 | https://digital.sciencehistory.org/works/8g84mm32q | ||||||||||||||||||||
| 授权 (二次使用本文件) |
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| 日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
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| 当前 | 2019年8月6日 (二) 13:29 |  | 3,276 × 2,668，2页（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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