Show HAMMOND LUMBER lur COMPANY j A i manufacturers OF 1 HAMMOND nAM MONO QUALITY I 1 TIMBERS LAGGING WEDGES GUIDES FRAMED TIMBERS I 1 MILLS SALT LAKE CITY OFFICE I 1 ASTORIA OREGON 1210 WALKER BANK J j MILL CITY OREGON 5 s s K S K FLOTATION MACHINE PATENTEE COMPLETE FLOTATION UNIT NO BLOWERS NO compressed AIR NO POROUS MEDIUM PULP AERATED IN A NEW AND NOVEL WAY POWER consumption 18 K W HOURS PER TON TREATED correspondence INVITED manufactured aured BY southwestern aern N EER I 1 NO CO 00 INC WESLEY ROBERTS ROBER rs LOS ANGELES ES OALIF CALIP J is sill you Have Tried the rest now use the best standard st n d r d coal oa I 1 STANDARD COAL CO general offices kearns SALT LAKE CITY UTAH I 1 A NEW ll 11 I 1 j ti I 1 handbook of rock excavation methods and cost by HALBERT POWERS GILLETTE member A 1 M E member A S C E i every mining man interested in the economic handling I 1 of ore and rock will find this new book a very valuable ad to his working equipment H it contains nearly three times as much material as rock excavation first published 12 years ago and used jj I 1 and commended by mining men all over the country j it gives the best modern practice in drilling blasting g j and transporting ore and rock under all conditions and raj j describes the latest machines and methods with detailed j costs of actual work done it gives the cost of installation and relative efficiencies of steam compressed air and other plants there is described such a wide range of conditions 0 ot f work that the engineer can scarcely fail to find in this book data on operations closely analogous to his own in 1 problem mining scientific press I 1 A little hint often results in a groat great saving apply I 1 some of the hints in this book to your work send for aa a j copy now pages illustrations J handsomely bound net postpaid j THE SALT LAKE MINING REVIEW distributors J 1601 walker bank building salt lake city T utah |