Letters from various British and international observatories on filling vacancies, plans for new improvements at Madras, and the formation of new observatories at Williamstown, Victoria, and other locations. The correspondents include E. Dunkin, J. Challis, R.C. Carrington, O.M. Mitchel, J.D. Forbes, R. Grant, Sir E. Sabine, Lord Wrottesley, N.R. Pogson, Professor Baden Powell, J.F.W. Herschel and R.L.J. Ellery. There are also tracings for the proposed Adelaide Observatory; a piece from 'The Boston Daily Advertiser'; an article on Dudley Observatory by B.A. Gould; plans of Madras Observatory on waxen fabric; minutes of the Radcliffe Trustees; information on clocks; drawings of instruments at the Williamstown Observatory; and a photograph taken at the Ochtertyre Observatory, Scotland.