This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 Excerpt: ...in compilation, and it exhibits at a glance the whole of the work of each contributor. The diagrams are not all drawn to one scale; but a scale of equal parts will at once show the value of 1." angle and distance has secured for it the careful attention of observers. 2., H, Da.. Se., Demb., and others have measured it. ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1879 Excerpt: ...in compilation, and it exhibits at a glance the whole of the work of each contributor. The diagrams are not all drawn to one scale; but a scale of equal parts will at once show the value of 1." angle and distance has secured for it the careful attention of observers. 2., H, Da.. Se., Demb., and others have measured it. H2 says, "Charmingly divided with 320. The discs like two grains of mustard-seed separated by one-third of the diameter of either." In 1839 Dawes could not separate the pair, and in 1866 Secchi describes it as "ovale." Between 1828 and 1866 the change in angle amounted to about 20, but owing to the extreme closeness of the stars it is difficult to detect in the measures the acceleration of angular velocity due to the decrease of distance. "If the measures in 1858 and 1869 are correct, the two stars have already passed their apparent periastre." (0.2. in 1877.) 1828-22 27 32-20 24 3'34 H, 3397, 0-31 Da. 336'i 3 7 9'67 0.2. 338-4 311.-743 40-56 8-22 58-50 69-17 Ma. 34'3 in. 0S0 41-42 45 64 2'45 81 3-28 31 512 H Se, 324-9 2n.-38 5752 66-95 De. in. single 3'6 57 7-0 Ta. 295-6 8 0-30 5-76 Du. 325-0 in. done'1. 9-02 75 7571 W., 292 Fl. 6-85 Dob. 315-8 3... 7-82 1803. it was 190 14'; which gives a change of 8 42' in 20 years and 242 days. This arises probably from a real motion of Jj in space; for parallax would have had a contrary effect.7 And Hs (Phil. Trans., 1824, part ii., ) remarks that "The changes, both in position and distance, of this remarkable star, have been regularly progressive." He gives measures from 1779 to 1821, points out that 2.'s position for 1814 is not reliable, and finds the angular motion to be o-5l33 per annum in the direction - / s p, and the period probab...
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