Fifth catalogue of double stars observed at Slough in the years 1830 and 1831 with the 20-feet reflector : containing the places, descriptions, and measured angles of position of 2007 of those objects, of which 1304 have not been found described in any previous collection : the whole reduced to the epoch 1830-0 / By J.F.W. Herschel ... ; communicated to the Royal Astronomical Society, June 7, 1832