Photograph film positive
- Made:
- 1919 in Mount Wilson
Photograph film positive, 16" x 20", portion of the Moon, photographed with the 100-inch Hooker Telescope of the Mount Wilson Observatory, 1919 September 15, region near Copernicus; including Western end of Apennines, with Eratosthenes, size of image 15" x 19 3/16"