(1) Collected Papers on Wave Mechanics (2) Four Lectures on Wave Mechanics: (3) Selected Papers on Wave Mechanics

IN the preface to the first of the above books, the author mentions a question asked him by a young woman friend: “When you began this work you had no idea that anything so clever would come out of it, had you?” This quotation certainly sums up the impression conveyed after reading (1). Schrodinger, however, uses it to bring out the point that in a set of papers in which a single theme is developed, the results of the later papers were more or less unknown when the earlier ones were written. This must be borne in mind when judging these collections. (1) Collected Papers on Wave Mechanics. By Prof. E. Schrodinger. Translated from the second German edition. Pp. xiii + 146. (London and Glasgow: Blackie and Son, Ltd., 1928.) 25s. net. (2) Four Lectures on Wave Mechanics: delivered at the Royal Institution, London, on 5th, 7th, 12th, and 14th March 1928. By Prof. Dr. Erwin Schrodinger. Pp. viii + 53. (London and Glasgow: Blackie and Son, Ltd., 1928.) 5s. net. (3) Selected Papers on Wave Mechanics. By Louis de Broglie Dr. Leon Brillouin. Authorised translation by Winifred M. Deans. Pp. vi + 151. (London and Glasgow: Blackie and Son, Ltd., 1928.) 15s. net.