REVIEWS 383 



Annual Report of the State Geologist, Geological Survey of New 

 Jersey, 1909. By Henry B. Kummel, State Geologist. 

 Pp. 123. 



Besides the administrative report this volume contains the following 

 papers: "Report upon the Development of the Passaic Watershed by 

 Small Storage Reservoirs," by C. C. Vermeule; "Records of Wells in 

 New Jersey, 1905-9," by Henry B. Kummel and Howard M. Poland; 

 "Notes on the Mineral Industry," by Henry B. Kummel. 



E. R. L. 



"A Proposed Classification of Petroleum and Natural Gas Fields 

 Based on Structure." By Frederick G. Clapp. Economic 

 Geology, Vol. V, No. 6 (September, 1910), pp. 503-21. 

 The classification proposed by the author of this paper is based on 

 the "anticlinal" or "structural" theory, which is called into use to 

 explain the segregation of oil, water, and gas from a primary disseminated 

 condition. Depending on the structures which have segregated and 

 localized the pools, seven classes of oil and gas accumulations have 

 been distinguished by the author: I, Where anticlinal and synclinal 

 structure exists; II, Domes or quaquaversal structures; III, Sealed 

 faults; IV, Oil and gas sealed in by asphaltic deposits; V, Contact of 

 sedimentary and crystalline rocks; VI, Joint cracks; VII, Surrounding 

 volcanic vents. Class I embraces most of the known oil fields and is 

 subdivided into five subclasses to distinguish the various relations 

 of the pools with anticlines and synclines. 



E. R. L. 



" Outline Introduction to the Mineral Resources of Tennessee." 



Extract (A) from Bulletin No. 2, Preliminary Papers on the 



Mineral Resources of Tennessee, State Geological Survey. By 



George H. Ashley, State Geologist. Pp. 65. 



This pamphlet contains a brief survey of the surface features of the 



state, the geological formations, and the geological history; and a list 



of the minerals of the state with a brief notice of their occurrence, use, 



etc. Bulletin No. 2, of which this is the first part to be published, is 



the first scientific publication of the newly established state survey, 



and is not intended as an original contribution but as a brief statement 



of facts already published, and is designed to meet the demand for 



immediate information on the mineral resources of the state. 



E. R. L. 



