OBSERVATIONS OF THE APPARENT DISTANCES AND POSITIONS OF 380 DOUBLE AND TRIPLE STARS, MADE IN THE YEARS 1821, 1822, AND 1823, AND COMPARED WITH THOSE OF OTHER ASTRONOMERS. In The Phil. Trans. 1824, Part III, Pp. 1-412
London: Royal Society, 1825. Original Wraps. Very Good+. Item #07804
Offered is a Very Good+ entire Part III of the Philosophical Transactions for 1824 in plain blue wrappers with date in ink spine, small chips spine tips, mild edge wear, small bookstore sticker front paste-down with off-setting ffep. Pages unopened and ucut. Full title "Observations of the Apparent Distances and Positions of 380 Double and Triple Stars, Made in the Years 1821, 1822, and 1823, and Compares with Those of Other Astronomers; Together with an Account of Such Changes as Appear to Have Taken Place in Them Since Their First Discovery. Also a Description of the Five-Feet Equatorial Instrument Employed in the Observations." 4to. Double stars, essentially discovered by William Herschel were of great interest throughout the nineteenth century - new ones being found and postition measurements made more precise with each improvement in telescope construction. South, working with John Herschel during the years 1821-1823, re-observed the double stars charted originally by William Herschel, mainly for the purpose of detecting position changes. Their observations helped verify the newly recognized orbital motion of these neighboring stars. Their resulting catalog of 380 double stars, presented to the Royal Society in 1834, earned them the gold medal of the Astronomical Society and the grand prize of the Institute France. (DSB 12, p. 552).
Price: $600.00