Results of Astronomical Observations: Made at the Observatory of the University, Durham, From January, 1846, to July, 1848 (Classic Reprint) - Hardcover

Inhaltsangabe

Excerpt from Results of Astronomical Observations: Made at the Observatory of the University, Durham, From January, 1846, to July, 1848

The 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 Hardy' s escape. Ment.

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