By G. Seligman
Mr. Seligman has produced a fascinating account of the various forms of snow and frost. He discusses in detail the conditions of their formation and the stages by which they, become converted into glacier-ice. His work is the result of long and detailed study and his theories have been checked, as far as possible, by deliberate observation and experiment, Furthermore, he is directly interested in the problems of the 'ski-runner and the climber, and the articles which he has contributed to the British Ski Year-Book are here amplified and extended. In snowcraft there is'no substitute for prat.; Akal experience, but Mr. Seligman's book (Macmillan, 25s.) should be studied by anyone likely to lead a snow-climb or a' ski-tour, for it will enable him to make the best use of his own. -experience. The book is clearly written and has nearly 400 illustrations, including some remarkable photographs of seracs, cornices and avalanches. The observational basis and the practical deductions of the theories are plainly stated, Some of the investigations are as fascinating as a detective- story, for the importance of the problems is obvious and the methods of research are ingenious yet simple. The publishers are thoroughly justified in saying that the book is likely to interest a wider circle than the scientists, explorers and :climbers for whom it is primarily written. The value of the book is enhanced by a brief but useful appendix on Alpine Weather, by Mr. C. K. M. Douglas.
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