Yerkes Observatory Buildings, Instruments, Equipment, Grounds
| Title | Yerkes Observatory Buildings, Instruments, Equipment, Grounds |
| View | 40-inch Refractor Telescope 34:1189 (2008-003) |
| Series | VI: Yerkes Observatory |
| Description | Slow motion motor and gears on the tube of the Yerkes Observatory 40-inch refractor telescope. |
| Subject Terms | Refracting telescopes | Motors | Gears |
| Photographer | Ellerman, Ferdinand, 1869-1940 |
| Photograph Date | 1903-04-01 |
| Physical Format | Glass plate negatives; 19.0 x 24.4 cm |
| Manufacturer | Alvan Clark & Sons; Warner & Swasey Company |
| Location | 373 West Geneva Street | Williams Bay, Wisconsin |
| Campus Grid | Y01 |
| Collection | Archival Photographic Files |
| Repository | University of Chicago Library, Special Collections Research Center |
| Image Identifier | apf6-00936 |
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