THE seventy-sixth volume of this valuable report on the year's rainfall contains the usual general table of returns from about 5,500 stations in the British Isles. In addition there are sections dealing with such special subjects as droughts, wet spells, duration of rainfall, heavy falls, monthly and seasonal rainfall, evaporation and percolation. From the foreword we learn that the revised system of classification of heavy falls in short periods, described last year in a special article by Mr. E. G. Bilham, has now been introduced. The main effect of the new scheme is to exclude many falls lasting only a few minutes from the 'noteworthy' category. It is also interesting to learn that the arrangements for charting rainfall month by month have now been so greatly improved that the charts prepared for the Monthly Weather Report are accepted, without substantial revision, for publication later in "British Rainfall".
Meteorological Office. British Rainfall, 1936: the Seventy-sixth Annual Volume of the British Rainfall Organization. Report on the Distribution of Rain in Space and Time over the British Isles during the Year 1936 as recorded by over 5,500 Observers in Great Britain and Ireland. (M.O. 415.) Pp. xix + 292. (London: H.M. Stationery Office, 1937.) 15s. net.