Monthly Notices of the Royal Astronomical Society 49
Monthly Notices of the Royal Astronomical Society 49
Royal Astronomical Society
The book Monthly Notices of the Royal Astronomical Society 49 was written by author Royal Astronomical Society Here you can read free online of Monthly Notices of the Royal Astronomical Society 49 book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Monthly Notices of the Royal Astronomical Society 49 a good or bad book?
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Circle divided on silver, reading to single minutes ; two inside arcs divided to single degrees, 150 degrees on each side ; artificial horizon and mercury. » 45- 9) 5-inch reflecting and repeating circle, by Lenoir, of Paris. „ 46. (20) Reflecting circle, by Jecker, of Paris, 1 1 inches in diameter, with one vernier reading to 15". „ 47. (21) Box sextant; reflecting plane and level. „ 48. (22) Prismatic compass, by Troughton and Simms. ?> 49* ( 2 3) Mountain barometer. „ 50. (24) Prismatic comp...ass, by Thomas Jones, mounted with a cylindrical lens. 9> 5 1 - ( 2 5) Ordinary 4^-inch compass with needle. 1 54 Eeport of the Council to tlte xlix. 4, No. 52. (26) Dipping needle, by Robinson. i> 53* ( 2 7) Compass needle, mounted for variation. „ 54. (28) Magnetic intensity needle, by Meyerstein, of Gottingon ; a strongly fitted brass box with heavy magnet ; filar suspension. » 55. (29) Box of magnetio apparatus. » 56- (3°) Hassler's reflecting circle, by Troughton; a io£-inoh reflecting and repeating circle, withstand and counterpoise, divided on platinum with two movable and two fixed indices ; four verniers read- ing to 10".
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