Miscellaneous astronomical methods, new inventions and instruments sent in by various scientists and interested parties. The correspondents include E. Dunkin, J. Nasmyth, J. Booth, Lord Rosse, W. Lassell, J.F.W. Herschel, J.J. von Littrow, J.D. Forbes, G. Fisher, J.R. Hind and C. Pritchard. There are pieces on water clocks and barrel clocks, with drawings of their mechanism; N.R. Pogson's paper on an 'occular crystal micrometer'; C.R.D. Bethune's paper on 'reducing the apparent distance of the Moon from Sun or Star'; application of photography to astronomy by W. De La Rue, in 'The Photographic Journal'; and directions to find a heavenly body by J.H. Tuckey. The volume also includes two lithographs of Lord Rosse's telescope, two engravings of a telescope by T. Cooke, catalogues for the sale of instruments, a reproduced photograph of the Sun, and a packet of spun glass thread.