558 Scientific Intelligence. 



and gravel, sand-lime brick, stone, abrasive materials, silica, mica, 

 feldspar, asbestos, talc and soapstone, barytes, gypsum, salt, 

 mineral paints, marl, pyrite and pyrrhotite, arsenic, phosphate, 

 graphite, rutile (titanium), monazite, mineral waters, precious 

 stones. h. e. g. 



3. Geological and Archaeological Notes on Orangia ; by J. 

 P. Johnson. Pp. 102, 45 figures and bibliography. New York 

 and London (Longmans, Green & Co.). — This volume might be 

 called an expanded notebook on the geography of Orangia 

 (Orange River Colony). It is the sort of description which is of 

 interest to one who desires a knowledge of the country and its 

 people. Interesting notes on climate, topography, on the dia- 

 mond, coal and salt prospects are mingled with data regarding 

 the plant and animal life of the region, population, history of 

 settlement, and present social and industrial conditions. 



The horizontally bedded rocks of the Karroo system extend 

 over nearly the entire territory with the exception of rocks of 

 earlier age exposed near Vredefort by planing down of an anti- 

 cline by marine denudation. Chapters 3 and 4 are devoted to a 

 discussion of the kimberlite dikes and pipes and the diamond 

 mines. The superficial deposits give evidence of a change in 

 climate during recent geologic time. Ancient spring deposits 

 and buried sand dunes are in evidence: An interesting series of 

 " pans ? ' apparently corresponding to the " buffalo wallows " of 

 North America are found in several localities. The larger pans 

 are bounded on one side by large dikes which intercept the 

 movement of ground water and determine the location of wells. 



The prehistoric inhabitants of this district are discussed in 

 chapters 6 to 8. Two distinct groups of stone implements, the 

 Acheulic and the Solutric, have been found, the former supposed 

 to be much older than the latter. The richness of the collections 

 may be indicated by the fact that on one Solutric site there were 

 gathered 1300 flakes and unfinished implements, as well as 700 

 finished flake tools. The petroglyphs and rock paintings of ani- 

 mals, men and mythological beings, which are figured in chapter 

 8, are especially interesting as indicating the stage of develop- 

 ment of those prehistoric people. h. e. g. 



4. Handbuch der Regionalen Geologic ; herausgegaben von G. 

 STEiNMANNund O. Wilckens. Heidelberg, 1910 (C. Winter). — 

 The aim of the projectors of this work is expressed in the title. 

 It is to produce a series of volumes which shall give in condensed 

 form, and yet with sufficient detail, an account of the regional 

 geology of the entire world, so far as now known. It is pro- 

 posed to carry out the work in 8 volumes of about 600 pages 

 each. The price per sheet, or signature, to subscribers is to be 

 50 pfennigs, or about 5 dollars a volume. In executing the work 

 the authors will have the help of a great number of geologists, 

 all the principal civilized countries being represented. One 

 thought that the proposal immediately suggests is that the dif- 

 ferent volumes for practical use will have very different values. 



