Mining and Engineering World . drill runner will operate it at goodefficiency. High-altitude rock drilling problems are best solved by the Electric-Air Drill, the electric power being available also forother work. Shall we send Bulletin No. 4109 ? INGERSOLL-RAND CO. NEW YORK LONDON DOMESTIC OFFICES: Birmingham Boston Butte Chicago El P;Cleveland Philadelphia Denver Pitt 1Duluth St. LouisFOREIGN OFFICES Seattle San Francisco Salt Lake Buda: Dusseldorf I-hannesburg ^ \icoKobe Montrealurne Paris ValparaisoYokohana ng to advertisers. It pleases them. 14 THE MINING WORLD COAL WASHERIES Illustration


Mining and Engineering World . drill runner will operate it at goodefficiency. High-altitude rock drilling problems are best solved by the Electric-Air Drill, the electric power being available also forother work. Shall we send Bulletin No. 4109 ? INGERSOLL-RAND CO. NEW YORK LONDON DOMESTIC OFFICES: Birmingham Boston Butte Chicago El P;Cleveland Philadelphia Denver Pitt 1Duluth St. LouisFOREIGN OFFICES Seattle San Francisco Salt Lake Buda: Dusseldorf I-hannesburg ^ \icoKobe Montrealurne Paris ValparaisoYokohana ng to advertisers. It pleases them. 14 THE MINING WORLD COAL WASHERIES Illustration shows Link-Belt Coal Wash-ery recently completed for the Central Coal& Coke Co., Dunkirk, Kansas. Capacity 3,001)tons a day. We have designed and installed the mostsuccessful plants in this country, particularsof which we will send upon request. LINK-BELT COMPANY PHILADELPHIA CHICAGO INDIANAPOLIS St. Central Natl Bank BUg. Seattle, 439-40 N. Y. BlockDenver, Lindrooth, Shubart & Co. San Francisco, Eby Mcby Mashek Engineering Co. 90 West Street, New York Manufacturers of Complete Machinery EquipmentsforFUEL BR1QUETTING MINING ROCK CRUSHING AND CEMENT MILLS CONCENTRATION ANDSMELTING PLANTS Contracts Taken for the Erection of Complete Mills


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