yo NEW BOOKS. 



Penck's term " tillite " in describing the boulder beds oi the Dwyka 

 series. To the general reader the chapter which deals with economic 

 geologj- will prove not the least interesting part of the book : here, as 

 in other parts, Tittle details illustrate the authors' desire to render their 

 work as up to date as possible, and so the latest information includes 

 such items as the experiments in fashioning the Knysua lignite into 

 briquettes, the occurrence of platinum in association with norite at 

 Insizwa, and the opening up of the Areachap copper lode. The map 

 at the end of the volume shows a considerable advance upon that in 

 the older edition. It is noticed that in one or two places very common 

 misspellings of Dutch topographical terms are perpetuated ; possibly, 

 however, these may be remedied in the next edition. 



High Frequency Currents. By H. Evelyn Crook, M.U., B..>. pp. 232. 

 49 illus. 2nd ed. 7s. 6d. London : Bailliere, Tindall &■ Cv.x. 



Transactions of the Geological Society of South Africa. Vol. XII. 

 Jan.-June, 1909. pp. iii, 15 plates. 21s. Johannesburg: Transvaal 

 Leader Office. Contents : On calcareous beds in the Pretoria series. 

 East of Potgietersrust and their metamorphism : A. L. Hall. — Note 

 on the schistose structures near the junction of the Pretoria series with 

 the Bushveld Plutonic Complex : A. L. Hall. — The Diamond Deposits 

 of Liideritzland, German South-West Africa : Hans ^^lerensky. — Note 

 on some rocks in the ^'olcanic series of the Karroo System m the Lem- 

 bombo jNIountains : J. McClelland Henderson. — The geology of ^klount 

 ]Mare, near Pietersburg, and its connection with that of ISIoodies, near 

 Barberton : A. L. Hall. — Some remarks on the intimate relations between 

 Archseology and Geology in South Africa ; with a description of Caves 

 containing human and other mammalian remains on the farms Wonder- 

 fontein and Rooipoort, Potchefstroom District : William Anderson and 

 Prof. G. H. Stanley. — Notes on acid intrusives in the Witwatersrand 

 System : M. Weber. — Some Shales in, and observations on. the Dolomites 

 of Pilgrim's Rest : A. von Dessauer. — Farther notes on tht- Auriferous 

 Conp^lomerates of the Witwatersrand, with a discussion of the origin of 

 the gold : Prof. R. B. Young. — Notes on the Tin Deposits in the Vicinity 

 of Cape Town : P. A. Wagner. 



Transactions of the Royal Society of South Africa. Vol, I., Pt. I., 

 1909. pp. 319 & xvi., 24 plates and 5 text figures. 25s. Cape Town : 

 Published by the Society. Contents :• — Cretaceous Gastropoda and 

 Pelecypoda from Zululand : R. B. Newton. ^ — A new variety of Ixodes 

 pilosus, Koch : J. G. Neumann. — A note on the distribution and hosts 

 of Ixodes pilosus Howavdi, Neum. : C. ^^'. Howard. — Transvaal sea- 

 level temperatures : R. T. A. Innes. — Some investigations regarding 

 " brack " (alkali) in Cape Colony soils : C. F. Juritz. — Contributions to 

 the African Flora : Harry Bolus and Louisa Kensit. — Descriptive 

 Catalogue of the Coleoptera of South Africa : L. Peringuey. — Preliminary 

 note on diurnal variation of Level at Kimberley : J- R- Sutton. — A 

 diplostigmatic plant, Sebcea exacoides (L.), Schinz (Belmontia cordata, L.) : 

 R. Marloth. — Some new species of Euphorbia from South Africa : R. 

 Marloth. 



Addresses Wanted. 



The Assistant General Secretary (P.O. Box i497. Cape Town) would be 

 glad to receive the correct addresses of the following members, whose last 

 known addresses are given below : — 



Boulton, H. C, c/o Messrs, Pauling & Co.. Ltd., Broken Hill, Rhodesia. 



Brooks, Edwin James Dewdney, C.E., Public Works Department, L'mtata. 



Brown, W'alter Bruce, District Engineer, Cape Government Railways, 

 Cradock, C.C. 



Carter, Thomas Lane, P.O. Box 25, Luipaards Vlei, Transvaal. 



Gillispie, John, Railway Survey Camp, George, C.C. 



Junod, Rev. H. A., Swiss Mission, Shilowane, Thabina, via Pietersburg, 

 Transvaal. 



Orpen, Joseph Millerd, Luxmore, Belvedere, Cape Town. 



Phillips, Geoffrey John, Acting District Engineer, De Aar, C.C. 



