Meporfs and Proceedings — Geological Society of London. 235 



Sardinia, and Madrid on the south. It will therefore prove a very- 

 handy guide to the geological traveller, and be useful also for general 

 reference. 



2, Mineralogy. Bj- F. H. Hatch, Ph.D., etc. Fourth edition, entirely 

 rewritten and enlarged, pp. ix + 253, with 124 illustrations. 

 London: Whittaker & Co., 1912. Price4s.net. 



AFTER passing through three editions without change this little 

 manual has been entirely rewritten, and in its latest form is 

 twice its original bulk. In the first part, dealing with the properties 

 of minerals, the chapter on physical properties has been considerably 

 enlarged, and a good account of the phenomenon of refraction is 

 included. The use of a different notation for elasticity axes might 

 have been preferred, however ; confusion with the crystallographic 

 axes may arise through the employment of small Old English characters 

 of the same notation. It may be noted also that " statical changes ", 

 mentioned in connexion with pyro-electricity (p. 57), should evidently 

 be read as "statical charges"'. A list of the more important mineral 

 species, classified according to chemical composition, makes a useful 

 addition. 



A much fuller account of the rock-forming minerals is to be found 

 in the second or descriptive portion, and the chapter on ores is almost 

 three times its original size. Considerable attention seems to have 

 been paid to the preparation of this book, and the student of 

 elementary mineralogy would do well to provide himself with a copy. 



3. Belemnitella 3iucsonata Chalk of SiMBmsK:. — The geological 

 library of the British Museum has received from the Ghornoi Institute 

 of St. Petersburg a copy of the rare volume " Nauchno-istorich. 

 Sbornik. — 1873 ", which contains Laghusen's paper on the 

 B. mucronata chalk of Simbirsk, with its four beautiful plates. 

 One might easily fancy oneself dealing with a typical Norwich fauna. 

 Considering the Ghornoi Institute had but three copies of the work 

 left, their action in presenting one to the British Museum (Nat. Hist.) 

 is most generous. It is of much service and will be highly appreciated. 



4. TopoGEAPHic Map of Meekathaera, Western Australia. — This 

 map, on the scale of 40 chains to an inch, and published by the 

 Geological Survey of Western Australia, is the work of Mr. H. W. B. 

 Talbot, Assistant Field Geologist, and represents part of the Murchison 

 Goldfield. 



ke!:f>oi?-ts .A-isriD ipiiOOEEinDiisrca-s. 



I. — Geological Society of London. 

 Felruary 28, 1912.— Dr. Aubrey Strahan, F.R.S., President, in 

 the Chair. 

 The following communications were read : — 



1. "Late Glacial and Post-Glacial Changes in the Lower Dee 

 Valley.'" By Leonard Johnston Wills, M.A., F.G.S , Fellow of 

 King's College, Cambridge. 



^ Communicated by permission of the Director of H.M. Geological Survey. 



