Traité de Géologie

Abstract

THE first volume of Prof. Haug's treatise on geology was noticed in NATURE last year (vol. Ixxviii., pi 123), and we now welcome the first part of the second volume, as it is as suggestive, and will no doubt be as useful, as its predecessor. The first volume deals with historical geology, and its first part describes the geological systems—of which the time equivalents are technically valued as periods—from the beginning of the geological record until the end of the Trias. The book continues Prof. Haug's valuable summaries of recent work, his judicious selection of new significant facts and figures, and it is rich in well-reproduced illustrations. It has the merit of being a very cheap text-book, as, though it includes 392 closely printed pages and twenty-eight excellent plates illustrating rocks, fossils and scenery, its published price is only 9 francs. A feature in the first volume that we remarked with regret was the scanry reference to British work; this volume is a great improvement in that respect, as British geology receives its fair share of attention, though the author must have missed several important recent memoirs or he would not have remarked that Carboniferous palæontology has been for a long time past neglected in this country or inserted the footnote on p. 763. The author does not always select for reference the most valued British results, for he quotes Monian and Arvonian, and omits some later more useful terms.

Traité de Géologie.

Vol. ii. Les Périodes géologiques. Fasc. i. By Prof. Emile Haug. Pp. 539-928. (Paris: A. Colin, 1908.) Price 9 francs.