. Fup. 28, 1895. THE ENGINEERING AND MINING JOURNAL. 169 THE HEADQUARTERS OF THE MINING INDUSTRY. We have great pleasure in announcing the opening of headquarters, and cordially extend to our friends from all parts of the world an invita- tion to make use of them. They will find here files of a great number of papers from the mining districts of this and other countries, and books of reference which can be consulted for information on any question in ~ whick they may be interested. Visitors can have their letters addressed in care of ‘‘The Engineering and Mining Journal,’ P. O. Box 1838, New York, and will find in the headquarters every convenience for correspondence. re = = a Entered at the Post-Office of New York, N. Y., as Second-Class Mail Matter. CYANOGEN BROMIDE AND POTAS3IUM CYANIDE FOR DISSOLVING GOLD. Our London correspondent advises us of a new solvent for gold with FEBRUARY 23. Vou. LIX. which experiments are being made by H. L. Sulman, an English chemist, for the Gold Ore Treatment Company, Limited, whict: has been organized RICHARD P. ROTHWELL, OC. E., M. E., Editor. to exploit it. The solvent consists in adding to a solution of potassium ROSSITER W. RAYMOND, Ph. D., M. E. Special Contributor" cyanide a portion of bromide of cyanogen, a salt which has hitherto had SOPHIA BRAEUNLIOCH, Business Manager. no commercial use. The reaction, as given by Mr. Sulman, is: 3 K Cy + THE SCIENTIFIO PUBLISHING 00., Pablishers, Br Cy + Au, = 2 AuK Cy, + K Br. In experimenting upon gold leaf it has been found that a five per cent. solution of potassium cyanide dis- solves the leaf in about 12 hours, but with an equivalent amount of to THE ENGINEERING AND MINING JOURNAL are PAYABLE nF BSC RLET ONS. For the United States, Mexico and Canada, $9 per annum; cyanogen bromide added, the same quantity of leaf dissolved in a few $2.50 for six months; all other countries in the Postal Union. 87. 7 minutes. By itself cyanogen bromide has no appreciable action on gold ‘The address slip on the paper will show date of expiration of subscription. Sub- will please give the name of the old post- scribers wishing their address changed ne leaf. The substance is in colorless, transparent crystals, extremely vola- well as the new one. E “ae OF DISCONTINUANCE.—The JOURNAL is not discontinue? at expiration tile, and with a pungent odor. Mr. Sulman claims to have a secret i 5 bscribers until an explicit order is received by us, and all pay- process for manufacturing cyanogen bromide by which it can a or cena is made, as required by law. The courts invariably hold a subscriber responsible to the publisher for the subscription price of all papers re- be produced for 1s. 9d. per pound, If further experiments ceived until the paper is paid for in full up to date and ordered discontinued. PAPERS RETURNED ARE any — veo OF DISCONTINUANCE, with this solvent prove as satisfactory as the inventors anticipate, it will " furnished on application. become an important factor in the treatment of gold ores. The further REMITTANCES anes always be made by Bank Drafts, Post-Office Orders or Express Money Orders on New York, payable to THE SCIENTIFIC PUBLISHING Co. claim made thatthe solvent will dissolve gold from unroasted pyrites calls THE SCIENTIFIC PUBLISHING COMPANY. for some proof. The idea is worthy of investigation. Cyanogen bromide is produced by distilling bromine with cyanide of mercury. It might be OFFICERS : | P. 0. BOX 1833. aia 253 Broadway, New York. well, in the same connection, to try the effect of an aqueous solution of R. P. ROTHWELL, Pres, & Gen'l Mang. | Cable Address: **Rothwell, New York, chloride of cyanogen and potassium cyanide. The former can be prepared SoPHIA BRAEUNLICH, SEc’y & TREAS. Use A B C Code, Fourth Edition, by passing chlorine through a tube containing cyanide of mercury, so placed as to be sheltered from light, and passing the gaseous cyanogen LONDON OFFICE: 20 Bucklersbury (Rooms 366 and 367), London, chloride evolved into water or a solution of potassium cyanide. E. C., England. Edward Walker, Manager. If any of our readers have experimented with cyanogen bromide and potassium cyanide we shall be pleased to receive detailed information of CHICAGO OFFICE: Monadnock Building, Room 737. their work. OFFICE: Cooper Building, Room 301. DENVER UNITED STATES PRODUCTIONZOF BESSEMER STEEL AND STEEL RAILS, 1894. CONTENTS, ' The American Tron and Steel Association has published the returns re- rage. ceived from the mauufacturers, showing the production of Bessemer steel 169 Headquarters of the Mining Industry..................... seteeec eases ingots and rails during last year. In these figures are included a small Gold.... 169 Cyanogen Bromide and Potassium Cyanide for Dissolving quantity of standard rails and some street and electric rails made by Steel Rails, 1894. 169 United States Production of Bessemer Steel and manufacturers from purchased blooms. In the production of ingots is -.. 169 A New International Monetary Conference.......................... included the output of the few Clapp-Griffiths and Robert-Bessemer 170 British vs. American Iron and Steel Trade ............. 0. cee. e cece. plants, and also the production of steel castings by Bessemer works. The Iodide Assay for Copper...... ..... ihagteraueenaae Albert H. Low 170 The following table gives the production of Bessemer steel ingots in The Selective Action of Potassium Cyanide............. E. A. Schneider 171 each half of 1894 and the total as compared with 1893. Tons of 2,240 Ibs.: Coal Consumption in the Desilverization of Lead, W. Maynard Hutchings 17i States—Ingots. | First second half 1804. half 1894. Total 1891.) Total 1893, The Wall Rocks of California Gold Mines.,.... ... W. H. Storms, M. KF. 172 Pennsylvania TTT eT rr ETT ee 1,129,559 1,206,439 2,335,998 2.126.220 Stamp Sand in Cement Mortar,...0 0.0... ee. Kdgar Kidwell 173 EEE og ac inadu oad nese deweureemendi act | 252,080 $29,460 581,540 314.829 Congelation at Anzin Colliery...................... 174 D ‘iui ott ne edddeaae wack weesaes 171,018 191.764 362.812 348,141 Sinking Shafts by IN voc: | oa veanrewenarvanccaa 114,767 183, 984 298,751 426,496 The Mining Exposition at Santiago, Chile...) . 174 *Lead Smelting in Scotland........... FRR eR EMO: A. H. Sexton 175 NG ieickeiwavocersees caawadadad 1,667,454 1,511,647 3,579,101 3,215,686 : *The Gradient-Telemeter Level... ...... RUS eT Aa ieee Lenka on 176 It will be seen that the production in 1894 was 363,415 tons greater Proposed Eight-Hour Day at English Furnaces........................ 176 than in 1893, a gain of 11°38 per cent. Atpatracte of GIiciad Reports: goons... ccciciisesscccccvecsccccctcccccsceccsess 177 The following table shows the total production of Bessemer steel rails Recent Decisions Affecting the Mining Industry.,....... ............ 178 in 1894, both those manufactured by ingot producers and by rolling mills Patents Relating to Mining and Metallurgy. _....................... 178 using purchased blooms : Personal, Obituary, Societies, Technical Schools, Industrial... 179 | Krom ingots | ~ From 4] Notes: French Winding Ropes of Diminishing Section, 178—Loss Bi ilies at of their own purchased Total. States— Rails. make. blooms. Gross tons, of Life in Mines, 178—The Railroad Councils of Prussia, 178. Gross tons. Gross tons, * tllustratea, PURNOTIVOMIE ss 06 ccdckscccccc 606.866 108,069 714,935 PINs daaks cae eanevianne 225,869 437 226,306 Cy ge)” en 66,385 6,408 72,793 MINING NEWS. LATEST MINING CHEMICALS AND Santiago, Chile. 190 PRO va cesane 184 MINERALS, Denver .. ...... 190 Na Sinn c kde anntoea she han 899,120 | 114,914 1,014,034 ATPIZONA...0¢+000 180 i seers = ania... 199 TORE BOiresc 6c sesecsonne __ 1,026,353, 93,047 1,129 400 oa siverpool..... PISIODUEH...<00. 190) California....... ise MARKETS Lonaon.......... 199 This shows a decrease of 115,366 tons, or 10.2 per cent. Of the total, Colorado... .... 180 MINING STOCKS: | Coal Stocks..... 19) ee 181 | COAL: New York.... 188; Ind. and Trust... 190 155,196 tons were rolled for street and electric railways in 1894, as against Georgia......... 181 New York.... 184 a 183| Colo Springs . 190 133,482 tons in 1893 and 111,580 tons in 1892. These were produced in Idaho...... .+++. 182| Buffalo........ 185} Salt Lake City 158| Helena.......... 19i Michigan... 182| Chicago....... 185) dan brancisco, 189 |} Shanghai...... 191 Pennsylvania only. Minnesota .. 182 Pittsburg. ... 185 London. ..... 189 | Ba tiimore ...... 191 Missouri.. 132 Shanghai. .... 185 FE. cccduses 189 | Salt Lake City. 191 Montana.. 182 Meetings...... Oe PRS sc cescees 191 A NEW INTERNATIONAL MONETARY CONFERENCE. Nevada..... .. 182| IRON: Dividends je 191 New Jersey..... 183 New York.... 185 Assessments. North carolina. 154 Chicago. ..... 186 CURRENT PRICES: The advocates of bimetallism find much encouragement in the cabled Gregun .... ... 183 Viltaburg..... 136 | STOCK QUOTATIONS: ! Chemicals ...... 191 announcement that the German Reichstag has decided by a large majority Pennsylvania,.. 183 Philadelphia...126| New Yurk..... 190] Mimerais........ 191 South Dakota.. 183 Kusion.......... 19) | Karer Metais... 191 to call an international monetary conference to take action for the re- ROUR oas cmawees 1s3 | METALS: DORMER. «..sc00%00 19) | MINING Co’s.... i92 Washington.... 134 Gold & silver 186] Aspen........... 199 ADVT. RAtES 18 habilitation of silver as money, and from the announcement made the Wyoming....... 184 Ovber Metals. 1871 San Fraocisco.. 190 ADVT. INDEX. 15 same day that the British Bimetallic League has raised a fund of £48,000 170 THE ENGINEERING AND MINING JOURNAL. Fre. 23, 1896. to enable it to prosecute a vigorous campaign of education, with the hope some time since, Mr. Head visited Birmingham, Ala., for the purpose of of making bimetallism one of the articles of faith in the conservative ascertaining whether or not the assertions so often made regarding the party at the next election, which is expected to take place at an early day.