. Industrial Education Magazine . mber ofproblems in each division is such that a selectionmay be made for students of varying ability,and that a variation from year to year may behad. The book is based on the findings of theOhio Survey on the Teaching of MechanicalDrawing in High Schools. FREE EXAMINA TJON COUPON McGRAW-HILL BOOK CO., Seventh Ave., New York You may send me on 10 days approval French and Svensens MECHANICAL DRAWING For High Schools $ I agree to pay for the book or return it,pcstpaid, within 10 days of receipt. Signed School Official Position Address 4-i-ii TR
. Industrial Education Magazine . mber ofproblems in each division is such that a selectionmay be made for students of varying ability,and that a variation from year to year may behad. The book is based on the findings of theOhio Survey on the Teaching of MechanicalDrawing in High Schools. FREE EXAMINA TJON COUPON McGRAW-HILL BOOK CO., Seventh Ave., New York You may send me on 10 days approval French and Svensens MECHANICAL DRAWING For High Schools $ I agree to pay for the book or return it,pcstpaid, within 10 days of receipt. Signed School Official Position Address 4-i-ii TRADE NOTES A NEW RULE I Vx * A new article, a 6-foot Boxwood ExtensionRule, particularly designed for taking inside meas-urements of openings, such as door and windowframes and similar fixed points, but just as handy asa common rule for ordinary measuring, has justbeen put on the market by The Lufkin Rule Co.,Saginaw, Michigan. While somewhat similar inpattern to a spring joint rule, it is made of genuineboxwood in natural The first section of the rule is fitted with a gradu-ated brass slide, which extends readily but is notloose and cannot fall out, having an end lock. Theextension slide is admirably adapted to determiningdepth of mortises, etc. The boxwood sections aresomewhat heavier than those of a common springjoint and are securely fastened at joints, making therule more rigid when extended than the ordinaryfolding rule. EXHIBITS AT ATLANTIC CITY Among the many commercial exhibits at therecent meetings of the National Society and theDepartment of Superintendents none probably at-tracted more attention and interest than the doubleexhibit of the American Wood Working Machinery JORGENSEN HAND SCREWS Withstand theabuse of inex-perienced hands. Steel Spindles Steel Nuts Hard Maple Jaws AdjustableClamp Co. 216 N. Jelferson St. Chicago
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