220 Scientific Intelligence. 



9. Geological Investigations in the Broken Hill Area; by 

 D. Mawson. Mem. Roy. Soc. South Australia, vol. ii, Pt. 4. Pp. 

 211-319, pis. xxxii. 1912. — The area described extends for 125 

 miles in an east-west direction on the border between South Aus- 

 tralia and New South Wales. The surface consists of ranges of 

 hills with intervening alluvial plains. The rocks exposed are an 

 ancient system of limestones, slates and quartzites together with 

 intrusive acid and basic rocks and a large development of schists 

 and gneisses. Much mineral wealth has been developed amongst 

 the more highly metamorphic rocks. The general structure of 

 the region is that of a highly folded anticlinorium. The sedi- 

 mentary rocks are Lower Cambrian. Beneath these and occupy- 

 ing the central portion of the area are pre-Cambrian igneous and 

 metamorphic rocks in which the chief mineral deposits lie. In 

 this pre-Cambrian area are granite masses with a profusion of 

 pegmatitic formations which frequently carry ore. The important 

 deposits are argentiferous galena-sphalerite bodies which are 

 thought to have come from an igneous magma by differentiation. 



w. E. F. 



10. The Turquoise. A Study of its History, Mineralogy, 

 Geology, Ethnology, Archceology, Mythology, Folklore and, 

 Technology; by J. E. Pogue. National Academy of Sciences, 

 vol. xii, Third Memoir. Pp. 155, figs. 5, pis. 22. 1915.— This 

 memoir, as its sub-title indicates, treats this important gem min- 

 eral from a great many view points. That it is exhaustive in its 

 scope and the product of a wide range of investigation is shown 

 by the extensive bibliography given, the titles of which fill 28 

 closely printed pages. The treatment is very interesting and read- 

 able. The numerous illustrations, some of them in color, are excel- 

 lent in execution and an important addition to the text. w. e. f. 



11. Chiastolites from Bimbowrie, South Australia; by D. 

 Mawson. Mem. Roy. Soc. of South Australia, vol. ii, Pt. 3., pp. 

 190-210, pis. xi. 1912. — This paper gives a description of the well- 

 known chiastolites from Bimbowrie, remarkable for their size and 

 structure. The growth of the crystals with the regular arrange- 

 ment of the inclusions is described and illustrated, w. e. f. 



II. Miscellaneous Scientific Intelligence. 



1. Ancient Hunters and Their Modern Representatives ; by 

 W. J. Sollas, D.Sc, F.R.S., Professor of Geology and Pala?- 

 onlology in the University of Oxford. Second edition. Pp. 

 xxiii, 591, 2 plates and 314 text illustrations. London, 1915 (Mac- 

 millan & Co.). — The first edition of this work appeared in 1911. 

 The author has made good use of the intervening four years as seen 

 by a comparison of the two. The number and titles (with a 

 single slight exception) of the chapters remain the same; but 

 there are 182 more pages and 80 more illustrations. The new 

 matter is largely due to the consideration of new discoveries such 

 as: Eocudhropus, Commont's researches in the Somme valley, the 

 caverns of Castillo, Tuc d'Audoubert, etc. The plan, and this 



