BOOK REVIEWS

Book reviewed in this article: The Chemistry of Plant and Animal Life, by Harry Snyder Practical Mathematics, by Norman M'Lachlan, Superintendent of Walton and Kirkdale Technical Institute and Special Supervisor of Engineering in the Technical Institute, Liverpool, England Models to Illustrate the Foundations of Mathematics, by C. Elliott . Theory of the Irreducible Cases of Equations, Part II, by Charles E. White, Professor of Mathematics in West Virginia Wesleyan College, Buckhannon, W. Va . Second Course in Algebra, by Webster Wells, and Walter W. Hart, University of Wisconsin . Molecules Atomes et Notations Chimiques, fourth volume of a series, “Les Classiques de la Science .” The present volume contains original papers by Gay‐Lussac, Avogadro, Ampere, Dumas, Gaudin and Gerhardt . Experiments for Students in General Chemistry, shorter course, by Edgar F. Smith, Blanchard, Professor of Chemistry, University of Pennsylvania, and Harry F. Keller, Professor of Chemistry, Central High School of Philadelphia . Industrial Chemistry for Engineering Students, by Henry K. Benson, Ph. D., Professor of Industrial Chemistry in the University of Washington . Plane and Solid Geometry, by Walter B. Ford, Junior Professor of Mathematics, The University of Michigan, and Charles Ammerman, The William McKinley High School, St. Louis, Mo. Edited by Earle R. Hedrick . Spherical Trigonometry, by Robert E. Moritz, Professor of Mathematics, The University of Washington . Technical Algebra, Part I, by Horace W. Marsh, Head of the Department of Mathematics, School of Science and Technology, Pratt Institute .