Installation of trunnion on the south float of the 10-inch telescope, Mount Wilson Observatory. The trunnion is seen mounted on the float, with ropes still attached by block and tackle. Wooden scaffolding is in front of the float. The interior balcony is behind the float; the interior walls are seen behind the balcony. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
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