Image: Assembling hooker polar axis
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Assembling_hooker_polar_axis.jpg (417 × 336 pixels, file size: 38 KB, MIME type: image/jpeg)
Description: The caption reads: "Erecting the polar axis of the 100-inch telescope."
Title: Assembling hooker polar axis
Credit: The New Heavens
Author: George Ellery Hale
Permission: Public Domain in U.S.; published before 1923.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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