W. H. Zachariasen: Theory of X-Ray Diffraction in Crystals. Wiley, New York, 1945. 255 s. $ 4.-.

M. K. Buerger: X-Ray Crystallography. Wiley, New York. 53 1 s. $ 6.50. -

Dana's System of Mineralogy. Seventh edition, entirely rewritten and greatly enlarged by Vharles Palache, Harry Berman and Clifford Frondel. Volume I: Elements, Sulfides, Sulfosalts, Oxides. (In preparation: Vol. Il: Halides, Carbonates, Sulfates, Borates, Phosphates, Arsenates, etc. -Vol. Ill: Silica, Silicates.) Wiley, New York, 1944. 834 s. $ 1 0.-.

H. U. Sverdrup, M. W. JohnsoN, and R. H. Fleming: The Oceans. Their Physics, Chemistry, and General Biology. New York 1942.