Allegheny Observatory - Machine Shop etc. - Al-Paslow
This is another Keeler sketch which at the eyepice of the 36 inch refractor at Lick Observatory. It is dated July 10, 1889 and signed J E Keeler.

This is another Keeler sketch which at the eyepice of the 36 inch refractor at Lick Observatory. It is dated July 10, 1889 and signed J E Keeler.

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