A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1859)
Mattison, Hiram, 1811-1868 · New York, Mason brothers · leaf 240
pon a universal hinge. It can be lowered to thehorizon, and raised to the zenith, and lowered northwardtill it takes in the Pole star. Its motion from east towest is limited to 15 degrees. This magnificent instru-ment is situated at Burr Castle, Ireland. It was con-structed by the Earl of Rosse, at… … TRANSIT INSTRUMENT. 538, A Transit Instrument is a telescope used for ob-serving the transit of celestial objects across the meri-dian, for the purpose of determining differences of rightascension, or obtaining correct time. They are usuallyfrom six to ten feet long, and are mounted upon a…
Astronomy
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