282 Scientific Intelligence. 



SCIENTIFIC INTELLIGENCE. 



Miscellaneous Scientific Intelligence. 



1. Las Formaciones Vblcdnicas de la Provincia de Gerona • 

 by S. Calderon, M. Cazurro, and L. Fernandez-Navarro. 

 Mem. R. Soc. Esp. Hist. Nat., vol. iv, 1907, pp. 159-489, 10 plates, 

 3 maps. — This is the report mentioned in the paper by the reviewer 

 in the present number, and was received shortly after the final 

 proofs had been returned. It is an excellent and detailed account 

 of the volcanoes of Catalonia and will long remain the standard 

 work on the subject. Cazurro gives a brief history and bibliog- 

 raphy of the region, after which Calderon describes the general 

 topographical and geological features of Catalonia and its vol- 

 canoes, and their relations to others in Spain. A list of Cata- 

 lonian earthquakes is given by Cazurro, and the same writer 

 describes in great detail the physical features of each volcano 

 and flow, of which he enumerates moi'e than fifty. Fernandez- 

 Navarro describes the petrography of the rocks with much detail, 

 finding them to be dominantly feldspar-basalts and nephelite- 

 basalts, witn some limburgites, tachylites, diabases, and others in 

 very small amount. The work is illustrated by numerous cuts, 

 with colored plates of rOck sections, and the maps add much to 

 the value. The report is of great interest and is highly credita- 

 ble to the Society and to the Commission to whom the investiga- 

 tion was entrusted. h. s. Washington. 



2. I Vulcani Attivi delta Terra; by G. Mercalli. Pp. 421, 

 Milano, 1907 (U. Hoepli). — This volume gives a general account 

 of the active volcanoes of the globe and, while intended primarily 

 for Italian readers, it contains much matter of interest to foreign 

 geologists. The author makes full use of his great knowledge 

 and long study of Vesuvius, but also avails himself largely of 

 others elsewhere. The structure and varied phenomena of active 

 volcanoes are described systematically, the examples and illustra- 

 tions being well chosen and widely scattered, and brief accounts 

 are given of the most noteworthy eruptions. In a descriptive 

 catalogue the author enumerates 415 active volcanoes. The causes 

 of vulcanicity are briefly discussed and the author seems to favor 

 the theory of Stubel. The volume is well and abundantly 

 illustrated. h. s. \v. 



3. Die Miner alien der Sudnoncegischen Granitpegmatilgange. 

 I. Niobate, Tantalate, Titanate and Titanonibate ; von VV. C. 

 Brogger. Pp. 162, with 8 tables. Kristiania, 1906 (Jacob 

 Dybwad). — The author's earliest studies on the minerals and 

 rocks of Norway, and the extraordinary richness of the results 

 which he has obtained, is so well known by all interested that it 

 need not be discussed here. Mineralogists will rejoice that he 

 has undertaken a comprehensive work describing the miner- 



