(1) THE progress of astronomy, as regards both the methods and results of research, is in these days so rapid that there is always room for a new and up-to-date text-book on the subject. Messrs. Skilling and Richardson's book is the most recent of several that have appeared in the past few years; and it covers the whole field of descriptive astronomy in a simple style, suitable for the general reader.
By William T. Skilling Robert S. Richardson. Pp. xi + 579. (London: Chapman and Hall, Ltd., 1939). 15s. net.
(2) Exploration du ciel
Par Pierre Rousseau. (Le roman de la science.) Pp. 256. (Paris: Hachette et Cie., 1939). 20 francs.