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The Mining Magazine Managing Director and Editor : W .F The Mining Magazine Managing Director and Editor : W .F . W h i t e . Assistants : S t . J. R .C . S h e p h e r d , A.R.S.M., D.I.C., F.G.S.; F. H i g h a m , A.R.S.M., M.Sc., F.G.S. Published on the 15th of each month by M ining Publications, L i m i t e d , at Salisbury House, London, E .C . 2 . Telephone : Metropolitan 8938. Telegraphic Address: Oligodase. Codes :M cNeill, both Editions, <5* Bentley. fNew York : Amer. Inst. M. & M.E. Branch Offices ? Chicago : 360, N. Michigan Blvd. Subscription {}.2Q-APe r« nnUm’ includit’g, P °staSe- , i.San Francisco : 681, Market. { U.S.A., $3 per annum, including postage. P R IGF Vol. XL1V. No. 5. LONDON, MAY, 1931 ONE SHILLING CONTENTS PAGE E d it o r ia l N e w s L e t t e r s Notes ........................................................ 258 B r i s b a n e .............................................................. 289 Safety in Mining Exhibition in Cologne ; British Mount Isa Activities ; Reduction of Coal Rates ; Palmer Engineering Standards Association Test Sieves ; Goldfield; Australian Gold Mining; Broken Hill Society of Chemical Industry’s Jubilee Celebrations; Mines ; New Gold Finds. Erratum ; Early Metallurgy ; Institution Awards. I p o h ...................................................................... 291 The Institution Dinner ........................ 258 Tin Restriction ; Tin Quota Scheme ; Evolution of the Industry. Proceedings at this annual function reviewed. T o ro n to .............................................................. 293 Rand Mining M ethods.......................... 259 Porcupine ; Kirkland Lake ; Rouyn ; Patricia District; A paper presented at the April meeting of the Institution Manitoba. is o.utlined. Johannesburg ................................................. 295 Platinum Group M etals........................ 261 New Goldfield in Rhodesia; An Alluvial Goldfield; New Morro Velho Claims Repegged; Transvaal The scope of the recently-opened extensions to the Torbanite Deposits; Aerial Mapping; Mining Mond Nickel Company’s Precious Metals Refinery Apprentices ; Memorial to Dr. David Draper. is examined. P e r s o n a l .................................................................. 296 R e v ie w o f M in in g ................. 262 T r a d e P a r a g r a p h s ............................................ 296 A r t ic l e s Wilson Plastic Arc Welders ......................... 297 The Ore-Deposits of the Otavi M e t a l M a r k e t s .................................................... 299 Mountains, South-West Africa S t a t i s t i c s o f P r o d u c t i o n ........................... 301 Alex. W. Clark 265 P r i c e s o f C h e m ic a l s ...................................... The author describes the general and economic geology 303 of the country, paying particular attention to the important vanadium deposits. S h a r e Q u o t a t i o n s ............................................ 304 P a n a m a ................ V. F. Stanley Low 273 M i n i n g D i g e s t The second of two articles by the author, in which he Flotation at the Amulet Mine, _ Quebec studies developments in the concessions of the Panama W. G. Hubler 305 Corporation. Deephole Drilling at the Rosebery Mine, Geophysical Tests in the Rhine Valley Tasm ania ..........I. D. Cameron 309 Dr. R. P. Reichenbach and Flotation of Oxidized Silver Ores H. S. Gieser 312 H. Bertram Bateman 280 Cyanide Extraction for Oxidized Copper In this article the authors describe the investigation Ores ...................................... E. T. Dunstan 314 of structural conditions by three methods of geo­ physical exploration. Tin Dredging ...................... O. B. Williams 316 S h o r t N o t i c e s .............................................. 316 L e t t e r t o t h e E d it o r R e c e n t P a t e n t s P u b l i s h e d ...................... 317 The Netherlands East Indies Geo- logical Survey .... /. 13. Scrivenor 285 N e w B o o k s , P a m p h l e t s , e t c ....................... 318 C o m p a n y R e p o r t s ............................................... 318 B o o k R e v ie w s Buena Tierra Mining; City Deep ; East Rand Proprietary ; Globe and Phoenix Gold ; Meyer and Charlton Gold ; Naraguta Winiberg’s " Surveying Calculations ” Extended ; New Kleinfontein ; Ooregum Gold Mining; Oroville Alex. Richardson 286 Dredging ; Pengkalen ; St. John del Rey ; Sinai Mining ; South Bukeru Areas; Sungei Kinta Tin Dredging; Tekka-Taiping; Peele’s “ Compressed Air Plant ” Waihi Gold Mining; West Rand Consolidated Mines; Wit- B. watersrand Deep.W. Holman 287 Fourmarier and Denoël’s “ Geologie et D i v i d e n d s D e c l a r e d ....................................... 320 Industrie Minérale du Pays de Liège ” H . Louis 288 N e w C o m p a n ie s R e g i s t e r e d .................... 320 5—4 257 EDITORIAL TECHNICAL exhibition, which will shows a certain degree of permanence for A devote special attention to work which work hardness in alloys of this type. contributes to safety in mining, is to be held in Cologne from June 25 to July 5. Official HIS year the gold medal of the delegates from the Board of Trade are T Institution has been awarded to attending the exhibition and visits will be Dr. Charles Camsell, Deputy Minister of arranged to important German mining Mines and Industries of the Dominion of properties. Canada, “ in recognition of his untiring zeal and great ability in promoting the develop­ ment of the natural resources of the Dominion N September last extended reference was and in furthering the general interests of the I made in these columns to a proposed mineral industry.” The Consolidated Gold new series of sieves suggested by the British Fields of South Africa gold medal goes to Engineering Standards Association. The Mr. C. W. B. Jeppe for his work on deep complete specification for these test sieves mine ventilation and the same company’s has now been issued (B.S.S. No. 410-1931) premium to Mr. E. G. Lawford for his paper and m ay be obtained from the office of the entitled “ Notes on Some Stoping Problems association. in Mexico.” The William Frecheville Students’ prize is awarded to Mr. W. H. HE jubilee celebrations of the Society Wilson for his paper on “ Bottom-Slicing T of Chemical Industry will be held in applied to Mining a large Irregular Replace­ London during the week commencing July 13. ment Deposit in Limestone.” The proceedings will comprise a wide pro­ gramme of scientific discussions, social functions, and visits to industrial centres The Institution Dinner and will be inaugurated by a reception by After a lapse of one year, occasioned by the the Lord Mayor at the Guildhall. absence of so many members in South Africa in connexion with the Empire AST month there appeared in the Congress, the dinner of the Institution of Mining and Metallurgy was held again last L M a g a z i n e an article by M r. H. G. Smith on the selection of a mine fan. Un­ month at the Hotel Victoria. The function, fortunately, an error was made in the four as usual, was well attended, not far short of fan characteristic curves which were used as two hundred being present, the company illustrations, owing to the omission of a including, in addition to members and their decimal point. The abcissae values, give n friends, many representatives of similar in the figures as 50, 100, 150, and 200, shoul d bodies. The chair was taken by Mr. J. G. obviously have been -50, 1-00, 1-50, and 2-00. Lawn, the president, and he was supported by the president-elect, Mr. W. Pellew- Harvey. N the course of a letter to Nature of April The toast of the evening—that of “ The I 18, in which he gives the results of an Institution ”—was proposed by Sir Auckland examination of an ancient Egyptian axe- Geddes, who spoke of the great advances head, Sir Harold Carpenter was able to shed which have been made in m etallurgical science some light on the methods of metal working and referred to the tendency to increased which were employed in its manufacture. mechanization of mining enterprises. In Analysis showed that the axe-head contained this connexion he pertinently reminded 96-9 per cent, of copper, 1-5 per cent, of members of their responsibility for the arsenic, 0-7 per cent, of iron, 0-2 per cent, creation of unemployment and of extra leisure of tin, and small quantities of nickel, sulphur, for those who continued to be engaged, and oxygen, and the experiments carried out incidentally touching on what is undoubtedly led to the conclusion that the axe-head had one of the major problems of our time—the been cast to shape, worked to some extent—- utilization of the leisure created by the probably by hammering—and annealed at process commonly known as “ rationaliza­ about 700° C. As the weapon was at least tion.” While praising the work of the 3,500 years old the investigation clearly Institution in the direction of raising the 258 standard of their own work, he looked forward to note the gaps in our knowledge, and to to increased co-operation with other technical draw up plans for work in various parts of the bodies, referring in particular to the proposed Empire, leaving the various governments new building of the Association of Scientific and institutions to fill in the details, all the and Technical Institutions, and assured old and the new information being finally members that many people not directly assembled by the committee.
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