Papers on adjustments, tests, trials, performances and purchase of facilities and equipment for the Royal Observatory, including adjustments to the transit circle and its errors, collimation observations, intervals of wires and corrections; removal and installation at Greenwich of the Lassell Reflector; construction of a dome for the 18 foot telescope; performances of spectroscopes, including one drawing; photoheliographs; chronographs; the new sidereal clock; the chronometers the Brockbanks 436, Graham 3 and Dent 1914, 2009 and 2012; and a double image micrometer. The correspondents include J.C. Adams, H.H. Turner, Sir H. Grubb, W. Huggins, Sir F.J.O. Evans, E. Dunkin, Airy and W.H.M. Christie. There is also an article in 'Nature', 1875, concerning a new mechanism for a standard sidereal clock.