548 Geological Society. 



genizing generally), preparation of salts, diazotizing, preparation 

 of ethers and esters, potash and soda fusion, condensation, nitra- 

 tion, oxidation, reduction, sulphonation, saponification. A few 

 pages at the end are devoted to some hints on elementary analysis 

 and the detection and estimation of nitrogen, the halogens, and 

 sulphur in organic compounds. 



Among the numerous books on practical organic chemistry now 

 at the disposal of laboratory workers there is none which occupies 

 exactly the same position as the work under consideration. It is 

 literally a " handbook" in the best sense. The various processes 

 described under their respective headings are introduced by a list 

 of the leagents employed, and then the more important special 

 methods of applying the reagents are described in some detail. It 

 will thus be seen that the book supplies the working chemist with 

 much about the same kind of information that a book on workshop- 

 recipes supplies to the mechanic. As such it will be found most 

 serviceable, and we have no hesitation in recommending its adoption 

 by chemists in this country. 



LV. Proceedings of Learned Societies, 



GEOLOGICAL SOCIETY. 

 [Continued from p. 380.] 



November 8th, 1893.— W. H. Hudleston, Esq., M.A., F.R.S., 



President, in the Chair. 



THE following communications were read : — 

 1. < The Geology of Bathurst, Ts T ew South Wales.' By W. J. 

 Clunies Boss, Esq., B.Sc, F.G.S. 



After sketching the physiography of the Bathurst district, the 

 Author describes in detail its stratigraphy. The oldest sedimentary 

 rocks are Silurian, but the floor on which they rest is unknown, 

 and the author states that it was probably fused up and incor- 

 porated in the granite which is described in the paper. The Silurian 

 rocks may have been folded before the granite was erupted ; in any 

 case the granite produced a zone of contact-metamorphism, whilst 

 almost all the Silurian rocks may be considered to be examples of 

 regional metamorphism, though the agents producing the meta- 

 morphism were least active to the east of Bathurst, where the Silurian 

 limestone's are very little altered. An anticlinal was prooably pro- 

 duced at the time of the granitic intrusion. After a time there was 

 subsidence, but at first it need not have been very extensive, since 

 the Devonian conglomerates, sandstones, and she 1 !}' limestones were 

 probably deposited in a comparatively shallow sea. They contain 

 Lepidodendron avstrah. At Rydal they abat against the uplifted 

 Silurian rocks of the Bathurst area. At the end of Devonian times 

 there appears to have been a long interval, during which both Silu- 

 rian and Devonian rocks were greatly denuded, ar d the granite 

 exposed in places. The Upper Carboniferous and Permian rocks 



