Letters from various observatories on filling vacancies, requests for information and for advice on instruments, and the formation of new observatories. The correspondents include J.R. Hind, C. Pasley, T. Maclear (a testimonial), J. Challis, W.S. Jacob, R. Sheepshanks, C.P. Smyth, G. Fisher, C. Pritchard, O.M. Mitchel, Captain P.P. King, Sir J.F.W. Herschel, W.R. Dawes and J.P. Nichol. There are communications with J.D. Forbes on the possibility of time balls at Edinburgh; reports by the Visitors to the Royal Observatory, Edinburgh, and to Liverpool Observatory; two pictures of the Georgetown Observatory, with a list of instruments; and an American cheque for £63 for a chronometer.