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Excerpt from Results of Astronomical Observations: Made at the Observatory of the University, Durham, From January, 1846, to July, 1848The Declination Circle is by Simms. It is 2 feet in diameter, and is inde pendently divided to 5' of arc. It is read by two microscopes at the extremities of the horizontal axis.The Clock is a very excellent one by Hardy, furnished with

Title : Results of Astronomical Observations: Made at the Observatory of the University, Durham, from January, 1846, to July, 1848 (Classic Reprint)
Author : Robert Anchor Thompson
Language : en
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Type : PDF, ePub, Kindle
Uploaded : Apr 07, 2021

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