Page:The Journal of geology (IA journalofgeology21894univers).pdf/240

This volume discusses the ore deposits and other minerals and rocks of commercial value found in the United States, as well as a few of the foreign deposits of a similar nature. The book is divided into three parts. Part I. treats of the general mineralogical, geological and technical subjects more or less directly related to the various mining industries. It gives, first, a chapter on "Common Rock and Vein-Forming Minerals," followed by chapters on the "Rocks of the Earth's Crust," the "Physical Geography and Geology of the United States," the "Origin of Ore Deposits," and "Mining Terms and Methods." Part II. treats of "Metalliferous Deposits," including the ores and deposits of the useful metals. Part III. treats of the "Non-metallic Mineral Products," such as coal, petroleum, fertilizers, building stones, etc. In addition, the volume also contains a short appendix on the "Literature of Economic Geology." The object of this volume, as stated by the author in the preface, is to supply the pressing need of a text-book to accompany a series of lectures given by him to a class of students in economic geology at Cornell University.

The book is beautifully printed and neatly bound. The illustrations are well reproduced, and, in fact, all of the publishers' work on the book is very good and reflects credit on Macmillan & Co. The book is written in good language, and the general scheme in the arrangement of the subject matter is logical, but the text is deficient and contains many erroneous statements. The chapters on the "Rocks of the Earth's Crust" and on the "Physical Geography and Geology of the United States," give a fair general idea of those subjects, although even here there are a number of inaccuracies. The chapter on "Common Rock and Vein-Forming Minerals" and parts II. and III. of the book, treating of "Metalliferous Deposits" and "Non-Metallic Mineral Products," however, relate more especially to economic geol-