284 PETROLOGICAL ABSTRACTS AND REVIEWS 



Farrington, Oliver Cummings. Meteorite Studies, III. Publi- 

 cation No. 145, Geological Series, Vol. Ill, No. 8. Field 

 Museum of Natural History, Chicago, 1910. 

 The publication includes: Description of a chondritic meteorite 

 which fell near Leighton, Ala., on January 12, 1907; description of a 

 large iron meteorite found at Quinn Canyon, Nev., in 1908; a collection 

 of analyses of taenite; a tabulation of the well-authenticated times 

 of fall of meteorites since 1800, compared for years, months, days, and 

 hours of the day; and a list of the meteorites of the United States, 



arranged by states. 



E. R. Lloyd 



Rosenbusch, H. Elemente der Gesteinslehre. Third revised edi- 

 tion with 692 pp., 107 figures, and 2 plates. Stuttgart, 1910. 



The appearance of a new edition of this standard textbook is a matter 

 of more than ordinary interest since it represents in briefer form the 

 results of the petrographical investigations of the last decade as sum- 

 marized in the fourth edition of Rosenbusch's Massige Gesteine. The 

 fact that the larger and smaller works follow the same general analysis 

 makes the latter especially satisfactory as a textbook for advanced 

 students who can use it. 



The new edition has been thoroughly revised and, where necessary, 

 enlarged by the incorporation of new material. The amount of such 

 additional material is much less than might be inferred by an increase 

 of nearly 150 pages which is due in a measure to the resetting of the work. 

 Certain changes in classification, the firmer drawing of the systematic 

 lines, an improvement in proportion (due to the fuller treatment of for- 

 merly neglected features), and the introduction of additional chemical 

 data are the chief changes noted. There still remain, however, several 

 changes which might be made to increase the logical coherence of the 

 systematic treatment and the completeness of the chemical discussion. 



The book, as in former editions, consists of three parts, dealing 

 respectively with the eruptive (70 per cent), sedimentary (13 per cent), 

 and metamorphic (17 per cent) rocks, preceded by an introduction. 



The "introduction" remains practically unchanged except for the 

 substitution of the new average for the composition of rocks obtained 

 by Clarke and a brief discussion of the cone-in-cone structure. 



Part I, "The Eruptive Rocks," following the earlier analysis, con- 

 siders them from the viewpoint of their substance, geological occurrence, 



