Yerkes Observatory
| Title | Yerkes Observatory |
| View | Rising Floor 4 |
| Series | II: Buildings and Grounds |
| Description | The wooden floor under the Yerkes Observatory 90-foot dome measures seventy-five feet across, and can be raised and lowered twenty-three feet, a range which allows the refractor telescope to point at objects near the horizon or at the zenith. |
| Subject Terms | Refracting telescopes | Floors (Surface elements) | Astronomical observatories |
| Photograph Date | Undated |
| Physical Format | Contact prints; 3.5 x 5.2 cm |
| Location | 373 W. Geneva Street | Williams Bay, Wisconsin |
| Campus Grid | Y01 |
| Collection | Archival Photographic Files |
| Repository | University of Chicago Library, Special Collections Research Center |
| Image Identifier | apf2-08902 |
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