Show the fundamental principles and practice of coal and metal mining published february 1923 new second edition elements ele ants of mining by GEORGE J YOUNG western editor Engi engineering and mining journal press second edition thoroughly revised seil pases 6 x 90 illustrations english price net postpaid all the material in this standard treatise has been thoroughly revised to bring it up to date the most important changes are 1 the entire revision of the introductory chapter 2 the chapter on drilling for blasting purposes has been rewritten and the recent progress in drilling appliances and the use of rock drills included fa 3 the chapter on rock breaking has been completely rewritten aj 4 the chapter on transportation and hoisting has been enlarged by including discussion of hoist appliances and shaft arrangements the book gives a comprehensive view of the whole mining problem the author has compressed an immense mass of material into a clearly written logical and well balanced treatment of a broad subject the book emphasizes fundamental engineering principles involve ng weight mass work space and the properties of the materials used and rock masses which are encountered it covers both coal and metal mining it brings out wherever possible the relation of geology to mining cost analysis examples of cost and the dimensional data established by mining practice are given throughout the book SALT LAKE MINING REVIEW distributors HP link belt silent chain drive drie 0 operating pe rating a dow dov triplex double plunger pump BETTER THAN BELTS OR GEARS of E have had two link belt silent chain drives in W WE services for seven years from 1911 to 1918 and we consider them superior to gearing or belting for all kinds of mining machinery and especially for underground service we prefer link belt silent chain because it is bushed statement by R chester turner vice president brunswick consolidated gold mining co grass valley calif let our experienced power transmission engineers show yon vou abat it will accomplish in your sour mill send for price list hat data book no LINK BELT COMPANY philadelphia PHILA DELPHIA CHICAGO indianapolis DENVER lindrooth Sliu bart company L am LT stock ce certificates pro prospectuses Prospect P uses ruled and printed forms distinctive DISTINCT IFE PRINTING 17 WEST SOUTH TEMPLE SALT LAKE CITY UTAH blank book manufacturers loose leaf ledgers tor every use |