. The World almanac and encyclopedia. HoQver and six otherexpert®. Coversthe whole fieldof miniiig fromsurvey of prop-erty to tihe eco-nomics of thebusiness flexiblevolumies splen-didly 801 pages fully illus-trated. IssuedJuly. 1917 —now taking themining world by storm. $3 Der month for 8 nonths. $34 complete MACHINE SHOP PRACTICE. The Machine Shop Library supplies aworking knowledge of modern machineshop prac-tice whichwill enableyou to qual-ify for thebest paidshop, posi-tion in Amer-i c a. Freefrom to grasp. Thor-oughly u p -to - date. 9volumes—3000 pages, fu
. The World almanac and encyclopedia. HoQver and six otherexpert®. Coversthe whole fieldof miniiig fromsurvey of prop-erty to tihe eco-nomics of thebusiness flexiblevolumies splen-didly 801 pages fully illus-trated. IssuedJuly. 1917 —now taking themining world by storm. $3 Der month for 8 nonths. $34 complete MACHINE SHOP PRACTICE. The Machine Shop Library supplies aworking knowledge of modern machineshop prac-tice whichwill enableyou to qual-ify for thebest paidshop, posi-tion in Amer-i c a. Freefrom to grasp. Thor-oughly u p -to - date. 9volumes—3000 pages, fully illustrated,$2 per month for 8 months.$16 complete. McGraw-Hill Book Co., Inc. New York 191. The Home StudyCourse in Practical Elec-tricity by Badcliffpmakes it easy for a manto master electricity fromthe records of actualpractice. No theory orcomplicated mathemat-ics. No preTious train-ing necessary. Used byspecialists as well as be-ginners. 3 volumes, con-taining 14iOO questions,fully answered.$1 per month for 6months. $6 complete COAL MINING The Home Study
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