Book reviewed in this article:College Algebra, by J. C. Palmer, Professor of Mathematics and Dean. of Students, Armour Institute of Technology, and W. L. Miser, Professor of Mathematics, Vanderbilt University.An Introduction to Linear Difference Equations, by Paul M. Batchelder, Adjunct Professor of Pure Mathematics, the University of Texas, published with the cooperation of the National Research Council.Modern Physics by Charles E. Dull, Head of Science Department, West Side High School, Newark, New Jersey.Electrical Engineering Laboratory Practice by Oskar E. Edison, Associate Professor of Electrical Engineering in the University of Nebraska, and Ferris W. Norris, Associate Professor of Electrical cal Engineering in the University of Nebraska.Mineralogy, an Introduction to the Study of Minerals and Crystals by Edward Henry Kraus, Professor of Crystallography and Mineralogy and Director of the Mineralogical Laboratory, University of Michigan and Walter Fred Hunt, Professor of Petrology, University of Michigan. Second Edition.