384: Scientific Intelligence. 



hardly anticipates its acceptance by the present generation of 

 scientific men. r. s. l. 



4. The Topographic and Geological Survey of Pennsylvania; 

 George H. Ashley, State Geologist. — Bulletins 1 to 25 of the 

 Survey were mentioned in the last number (pp. 305, 306). Nos. 

 26 to 35 are now issued (also mimeographed). These are all 

 devoted to coal beds or coal reserves in various countries except 

 No. 28 which discusses the magnesite of the State ; it is by R. W. 

 Stone. 



5. Geological Survey of the Union of South Africa; Percy 

 A. Wagner, Geologist. — Memoirs issued at Pretoria, are Nos. 16 

 and 17, both by Dr. Wagner, and liberally illustrated. No. 16 

 discusses the Mutue Fides — Stavoren Tinfields and is a valuable 

 contribution to a subject of wide interest. 



No. 17, also by Dr. Wagner, is a report on the Crocodile River 

 iron deposits. Though at present rather inaccessible, particu- 

 larly in the rainy season, being 68 miles from the nearest railway 

 station, they promise to be of much importance in the future. 



The geology of the country surrounding Johannesburg, being 

 an explanation of the Johannesburg sheet (No. 52), is discussed 

 by Dr. E. T. Mellor in a pamphlet of 46 pages. 



6. Carboniferous Glaciation of South Africa. — This is the 

 title of a paper by Alex. L. du Toit published in the Transac- 

 tions of the Geological Society of South Africa (vol. 24, 1921). 

 A map shows clearly the radiation of the Carboniferous ice. It 

 is stated that the Dwyka ice-sheet of the Upper Carboniferous 

 was formed by the ice coalescing from several distinct centers, 

 Namaqualand, Griqualand West, Transvaal and Natal. The gen- 

 eral direction was southerly or pole- ward. 



7. South Australia Geological Report for 1920; L. Keith 

 Ward, Director of Mines and Government Geologist. Adelaide, 

 1921. Eight pages. — The report of the director recently received 

 presents concisely the geological and economical results of the 

 year 's work. 



The Department of Mines has also issued No. 34 (74 pp., illus- 

 trated) of the Mining Review for the half-year ending June 30, 

 1921. This has been compiled by Lionel C. E. Gee. 



8. Mineral Production in the United States and elsewhere. — 

 Under the general head of Mineral Resources of the United 

 States are to be mentioned, first of all, the well-known publica- 

 tions of the U. S. Geological Survey, which are issued in separate 

 chapters and kept admirably up to date. 



The very varied mineral resources of the State of New York 

 are presented by David H. Newland in the Museum Bulletin 

 (Nos. 223, 224), John M. Clarke, Director under the University 

 of the State of New York. Some forty separate important min- 

 erals and rocks are enumerated and their occurrence described in 

 this publication of 315 pages (illustrated). 



