BOOK REVIEWS

Book reviewed in this article: America at Work Series: Machines for America; Power for America; Wings for America, by Marshall Dunn, Author of “Science and Modern Progress” and “Up to Civilization ,” and Lloyd N. Morrisett, Professor of Education, University of California, Los Angeles . Factors Affecting Student Achievement and Change in a Physical Science Survey Course, by Waldo Lyle Brewer, Ph.D. The Practical Outline of Mechanical Trades for Home Study, edited by William L. Schaff, Assistant Professor of Education, Brooklyn College . Practical Physics, by Marsh W. White, Ph.D., Editor, Professor of Physics ; Kenneth V. Manning, Ph.D., Assistant Supervisor of Physics Extension ; Robert L. Weber, Ph.D., Assistant Professor of Physics ; R. Orin Cornett, Ph.D., Lecturer in Electronics, Harvard University Heat and Thermodynamics, by Mark W. Zemansky, Ph.D. Mathematics for the Sheet Metal Worker, by Clayton E. Buell, B.S., M.Ed. Educators Guide to Free Films, Third Edition, Compiled and Edited by Mary Foley Horkheimer; and John W. Differ, M.A. Methods of Teaching in Town and Rural Schools, by E. L. Ritter and L. A. Shephers Radio Education Pioneering in the Mid‐West, by Albert A. Reed, LL.D., Formerly Deputy State Superintendent of Public Instruction, Lincoln, Nebraska; Director‐Emeritus, University Extension Division, University of Nebraska; Professor Emeritus, Secondary Education, University of Nebraska . Piloting and Maneuvering of Ships, by Lyman M. Kells, Ph.D., Associate Professor of Mathematics ; Willis F. Kern, Associate Professor of Mathematics ; and James R. Bland, Associate Professor of Mathematics Navigation, by Lyman M. Keils, Ph.D., Professor of Mathematics ; Willis F. Kern, Associate Professor of Mathematics ; and James R. Bland, Associate Professor of Mathematics