. The World almanac and encyclopedia. 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. PRACTICE. Course in coal mining will bring you more practicalinformation on coal mining in Ameri-ca than one man could possibly gainin a lifetime of actual practice. Thesebooks make promotio
. The World almanac and encyclopedia. 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. PRACTICE. Course in coal mining will bring you more practicalinformation on coal mining in Ameri-ca than one man could possibly gainin a lifetime of actual practice. Thesebooks make promotion sure. Eightvolumes—3000 pages, illustrated. Notheory—just facts. $2 per month for 8 months.$16 complete. FREE EXAMlNftTION CQUPDN McGRAW-HILL BOOK CO., W. 39th St., New York. Geaitilemen:—i am interested in the HoaneStudy Course checked (below. Pleas© send methis Library, charges paid, for 10 days free examdnatioD. ....Machine Shop Library $16 i ....Metal Mining Library $24 i ,.. .Coal Mining Library $16 ,,....Power Library $12 , ... .iPractical Eflectricity Liibrary ^8If satisfactory. I Avill send the first mootlh sinstallmewt within 10 days and the remaanderin equal monthly paymeirts as stipuilatedabove until the full price has been paid. Jfthe ibooks are not what 1 waflit I will write forshipping: instructions. 239 West 39th St. Name • Home Address »,..«» City and
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