REVIEWS 257 



Contributions to the Hydrology of Eastern United States, 1903. By 

 Myron L. Fuller. (Water Supply and Irrigation, Paper No. 

 102, U. S. Geological Survey, 1904.) Pp. 512. 

 This paper covers the hydrologic work done in the eastern United States 

 in 1903. The statistics are, arranged by states. The information was col- 

 lected by many local geologists, and compiled and prepared by Mr. Fuller. 



E. W. S. 



The Sources of Water Supply in Wisconsin. By William Gray 

 KiECHOFFER, C.E. (Bulletin of the University of Wisconsin, No. 

 106.) Pp. 113, 3 plates, 3 diagrams, and 21 tables and index. 

 The bulletin is a compilation of data regarding the water used by cities 

 and villages in Wisconsin, together with many interesting observations 

 thereon. The sources are classified, and the factor entering into occur- 

 rence and use are discussed. E. W. S. 



The Geology of the New Hebrides. By D. Mawson, B.E., B.Sc, 

 Lecturer in Mineralogy and Petrology at the University of Ade- 

 laide. Pp. 85, 14 plates, 7 figures. (Proceedings of the Linnean 

 Society of New South Wales, Part III, October, 1905.) 

 Little has been known of the New Hebrides because of the hostility of 

 the natives and the prevalence of malaria. The group of islands was devel- 

 oped as a fold in the Miocene, and intrusion and extrusion of andesitic lava 

 accompanied the folding. About Middle Pliocene there was renewed vol- 

 canic activity along a new line, and this has continued to the present. This 

 later flow is basic, and was probably immediately preceded by faulting. 

 Recent uplift has carried coral reefs up to 2,000 feet. These are underlain 

 by tuffaceous beds. The uplift is one-sided, being less on the east side, 

 where the centers of eruption are. 



Biological evidence points to connection of the islands with other land 

 masses early in their history. 



The author points out that the South Pacific Islands are lined along 

 great fold-chains, concentric with Australia, and puts the New Hebrides, 

 Sumatra, New Caledonia, and New Zealand in one of these chains. The 

 discontinuity of the land is referred to cross-faulting, incident to folding. 

 He believes that the land area was much larger and more continuous in the 

 early Tertiary, and that the breaking up began then. From evidence of 

 coral reefs, it appears that in these and many other islands of the South 

 Pacific the first movement was true folding, and this was followed by hori- 

 zontal uplift. The petrology, paleontology, and other features of the 

 islands are treated in some detail. E. W. S. 



