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; together with an Account of Such Changes as Appear to Have Taken Place in Them since Their First Discovery. Also a Description of a Five-Feet Equatorial Instrument Employed in the Observations

J. F. W. Herschel, J. South
1815 Proceedings of the Royal Society of London  
doi:10.1098/rspl.1815.0247 fatcat:72xtggvklvg2rcagpqn5l4dwqu