THE most complete seismological equipment in the British Isles is at Kew Observatory, and thanks largely to the enterprise of its superintendent, Dr. F. J. W. Whipple, the performance of this has recently been vastly improved. Dr. A. W. Lee, the seismologist at Kew, has now written an account of the new installation (Meteorological Office, Geophysical Memoirs No. 78, sixth number, 9. London: H.M. Stationery Office, 1939. 2s.).