142 Reviews — Swiss Mineralogy and Petrography. 



The coal resources of Herzegovina are relatively insignificant^ 

 A small Oligo-Miocene coal basin occurs in tlie immediate vicinity^ 

 of Mostar, and is being worked, while smaller detached areas are 

 described as flooring many of the poljes which form so distinctive 

 a feature of the otherwise barren Herzegovinian limestone plateau. 



From his exhaustive study of the several areas, Dr. Katzer 

 estimates that the total quantity of coal available in the coalfields- 

 of Bosnia and Herzegovina may safely be computed at 758 million 

 metric tons, of which 20 per cent consist of Oligo-Miocene brown 

 coal, while the remaining 80 per cent consist of the lower grade 

 Pliocene lignitic coals. Adding to this the possible coal resources 

 in areas not completely surveyed, which amount to no less than 

 4,941 million metric tons, it will be seen that Bosnia has, probably 

 of all Balkan lands, by far the richest fuel resources ; a valuable 

 asset to a State like Yugoslavia, whose industrial developments, 

 have only reached an embryonic stage. 



Each volume is accompanied by a useful folding geological map, 

 the first by a coloured map of the Sarajevo-Zenitsa coalfield on a. 

 scale of 1 : 75,000, and the second by a coloured map of the coal- 

 fields of Bosnia and Herzegovina or, a scale of 1 : 750,000. 



D. A. Wray. 



SCHWEIZERISCHE ■ MiNERALOGISCHE UND PeTROGRAPHISCHE 



MiTTEiLUNGEN. Band I, Heft 1/2. pp. 1-214, 1921. Huber 

 and Co., Frauenfeld. 



nnO those geologists who have found access to the petrographical 

 -^ literature of Switzerland, a matter of some difficulty, the- 

 appearance of a new journal devoted to Swiss mineralogy and 

 petrology will be especially welcome. Hitherto much Swiss petrology 

 has appeared in " dissertation " form, or as papers in local journal* 

 of very limited circulation ; few libraries indeed, in this country, 

 would, for instance, possess volumes of the Jahresbericht der 

 Naturforsch. Gesellschaft Grauhilndens. It is to the interest of 

 geological science that its publications be segregated as far as possible- 

 in specialized journals, and not difiused through organs embracing 

 the whole gamut of science, and in this connexion, to refer to imperial 

 geology, the example of the Geological Society of South Africa 

 might well be followed with advantage in other dominions of the 

 Empire. The new Swiss journal now appearing will doubtless make- 

 available, in a readily accessible form, work otherwise almost lost- 

 to other countries. In the present number five articles are con- 

 tributed — all in German — and include studies on the serpentine and 

 talc of Disentis Surrhein, the wolfram deposits of the Argentine, 

 the radioactivity of some Swiss rocks, a petrographic study of the- 

 region of Piz Languard (Oberengadin), and on the fluorspar of 

 Sembrancher (Wallis). 



The journal is published under the editorship of Pro- 

 fessor Grubenmann, with an annual subscription rate of 25 francs. 



C. E. T. 



