Revieivs — Transactions of the Hull Geological Society. 331 



liead of this review, and this is by no means an isolated example : 

 some are even worse than this. 



Transactions of the Hull Geological Society. Vol. VI, 

 Part IV, for the years 1910-1921. Edited by T. Sheppard, 

 M.Sc, F.G.S. 

 Transactions of the Leeds Geological Association. Part 



XVIII, 1913-1920. 

 A FTER an inevitable temporary eclijDse due to war conditions, 

 ■^^ our local geological societies are now making praiseworthy 

 efforts to publish the results of much useful work done during the 

 last few years. The two parts of Transactions quoted above contain 

 numerous interesting notes on a wide range of subjects. The first- 

 named contains papers by Mr. T. Sheppard, on Early Humber 

 Geography, a subject to which he has contributed much valuable 

 knowledge by his investigations ; by Mr. W. H. Crofts and Mr. F. L. 

 Pawley on the geology of a new dock at Hull ; by Mr. Bisat on new 

 sections, well-sinkings and borings in Cretaceous and Jurassic strata 

 near North Ferriby ; by Mr. J. W. Stather on a new section in 

 Glacial deposits and Oolites near South Cave ; by Mr. Sheppard on 

 the water supply of Hull, and notes on excursions, illustrated by 

 numerous plates and text-figures, all apparently un-numbered. 



The publication from Leeds also contains much of interest, mainly 

 in the form of very short notes and abstracts, includuig Creep, by 

 Mr. H. Preston, an account of rock movements caused by engineering 

 work ; A Borehole at Meanwood, by Mr. A. Gilligan ; Peat Problems, 

 by Miss E. D. Whitaker, dealing mainly \^ith composition and ash- 

 content of different peats ; Notes on some sections in Elland Road, 

 Leeds, by Messrs. J. H. Everett and G. F. Pickering. These are 

 well illustrated by plates and figures. There are also extracts from 

 annual reports and notes of excursions. 



Both societies are to be congratulated on the resumption of their 

 publishing activities. 



The Mutue Fides-Stavoren Tinfields. By Percy A. Wagner, 

 Ing.D., B.Sc, etc. Union of South Africa Geological Survey 

 Memoir No. 16. pw. 192, 31 plates, 27 text-figures. 1920. 

 7s. M. 



A FTER discussing the general conditions and physical features of 

 -^ the district, the writer deals at some length with the petrology 

 of the acid members of the Bushveld complex as developed in* these 

 tinfields. These consist of granite, granophyrio granite, and 

 granophyre in a stratiform laccolith with a xenolithic zone where 

 the laccolith came into contact with the Waterberg quartzites. 

 No evidence of magmatic assimilation of these quartzites has been 

 obtamed. The jiegmatites associated with these intrusions are 

 divided into intrusive and segregation pegmatites, the former 



