File:Beckman Ir-1 Spectrophotometer, ca. 1941.jpg
本预览的尺寸：800 × 533像素。 其他分辨率：320 × 213像素 | 640 × 427像素 | 1,050 × 700像素。
原始文件 （1,050 × 700像素，文件大小：450 KB，MIME类型：image/jpeg）
| 描述 |
English: Beckman Ir-1 Spectrophotometer, ca. 1941. On loan from Beckman-Coulter Inc. to the Chemical Heritage Foundation.
Arnold Orville Beckman and Beckman Instruments produced the Beckman IR-1 in 1942 specifically for the Rubber Reserve. By 1945 approximately 75 of the IR-1s had been made—entirely for use by the U.S. synthetic-rubber effort. No one was allowed to publish or discuss anything related to the new machines until the war was over. Downloaded with permission from the Chemical Heritage Foundation, as part of the Wikipedian in Residence initiative. |
| 来源 | Chemical Heritage Foundation. |
| 作者 | Gregory Tobias |
| 授权 (二次使用本文件) |
   本文件采用知识共享署名-相同方式共享 3.0 未本地化版本许可协议授权。 署名: Chemical Heritage Foundation
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| 当前 | 2013年6月21日 (五) 14:44 | | 1,050 × 700（450 KB） | Mary Mark Ockerbloom | {{Information |Description ={{en|1=Beckman Ir-1 Spectrophotometer, ca. 1941. On loan from Beckman-Coulter Inc. Chemical Heritage Foundation, Photograph by Gregory Tobias. Beckman Instruments produced the Beckman IR-1 in 1942 specifically for the Ru... |
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