ECONOMIC GEOLOGY

Economic Geology. Charles H. Richardson, 1892. McGraw Publishing Co., New York City.

The ores included in Professor Richardson's Economic Geology are those of the metals only.

The book contains two introductory chapters on forms and origins of ore deposits, a chapter on precious metals, five chapters on useful metals, one chapter on rare metals, and one on "economics."

Though the introduction comprises only the first chapters which includes primary sources of ores, vein structure, and classification of ores, the second chapter, in which the origin of ore deposits is discussed, might well be included.

Aside from the chapter on precious metals and that on rare metals, the metallic minerals are arranged for study in the order of their chemical analysis.

Each metal is treated in the following. order: description of the various ores; origin of ores; character of ore bodies; geographic distribution; geologic horizons; extraction of the metal; and uses. Other text books do not usually give as much space to the subject of extraction of the metals. Of course, in as compact a text as is necessary for such a course, there is little Space for description of the various methods of extraction, yet an outline of these methods is very useful in the elementary study of economic geology. This is particularly true of the various costs of production.

The final chapter on "economics" is made up almost entirely of figures of priced, production, exports, and imports. The metals are taken up in the order of their occurrence in the preceding chapters. This information might be included, for the sake of compactness and convenience, with that given for each metal in the earlier chapters. The book is copiously illustrated with sketches, maps, and photographic plates. M.

Robert H. Fletcher, 1896, is the author of A Brief Shakesperean Glossary,Grammar and Booklet of Other Information Necessary to Students. Of this book and his Tennyson and Browning, another recent publication, Dr. A. H. Licklider of the College says:

"Both works should prove of value to students and teachers, because they bring together material usually scattered through a large number of books or available only in a lecturer's notes. I have been especially pleased with your manual for Tennyson and Browning. Your chapters dealing with the England of the two poets, and with aspects of their work* are particularly valuable."

Professor Fletcher's latest book, Principles of Composition and Literature, published by A. S. Barnes will be reviewed in a later issue of the MAGAZINE.