THIS interesting book is divided into two portions: the first by Krumbein deals with size determination of sedimentary particles, and the second part, by Pettijohn, is largely concerned with the optical properties of minerals. All who are interested in sediments will find this book most useful, as it contains descriptions of various techniques and methods of interpretation.
Manual of Sedimentary Petrography
1. Sampling, Preparation for Analysis, Mechanical Analysis, and Statistical Analysis, by W. C. Krumbein.; 2. Shape Analysis, Mineralogical Analysis, Chemical Analysis, and Mass Properties, by F. J. Pettijohn. (Century Earth Science Series.) Pp. xiv + 549. (New York and London: D. Appleton-Century Co., Inc., 1938.) 30s. net.