Yerkes Observatory Buildings, Instruments, Equipment, Grounds
| Title | Yerkes Observatory Buildings, Instruments, Equipment, Grounds |
| View | Measuring Machine 55:812 (2008-003) |
| Series | VI: Yerkes Observatory |
| Description | Gaertner single-screw machine of Yerkes Observatory used for parallax plates to make precise measurements of line positions, front view. |
| Subject Terms | Measuring instruments | Stellar parallax | Photographic plates | Astronomical instruments | Astronomical photography |
| Photograph Date | 1911-10-23 |
| Physical Format | Glass plate negatives; 19.8 x 24.4 cm |
| Manufacturer | William Gaertner & 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 | apf6-01363 |
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