File:Kristian Birkeland photographed with a spy camera.jpg
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English: Professor Kristian Birkeland photographed with a spy camera outside the university, Kristiania (Oslo), Norway. Ca. 1895.
Fredrik Carl Mülertz Størmer (1874-1957) was a mathematician and northern light scientist. He became cand. Real. in 1898. From 1903 he was Professor of Mathematics at the University of Oslo, a business he maintained until 1946. As a student, in 1893 he received a detective camera that could be hidden under the west with the lens out through a buttonhole and with a cord in a pants pocket. He photographed people he met at Karl Johan and other places in the Kristiania of the 1890s. Byhistorisk samling. Inventarnr. OB.F04143a |
| Date | |
| Source | Oslo Museum: image no. OB.F04143a, via digitaltmuseum.no. |
| Author | Carl Størmer |
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| current | 20:29, 2 December 2017 | | 1,155 × 1,200 (760 KB) | Anne-Sophie Ofrim (talk | contribs) | Cropped 3 % vertically using CropTool with lossless mode. |
| 09:59, 25 November 2017 |  | 1,155 × 1,240 (749 KB) | Frankemann (talk | contribs) | User created page with UploadWizard |
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