Page:The slide rule; a practical manual by Pickworth, Charles N.djvu/125

Rh ADVERTISEMENTS EUGENE DIETZGEN GO. NEW YORK CHICAGO 214=220 East 23rd Street 181 Monroe Street NEW ORLEANS SAN FRANCISCO 615 Common Street 16=28 First Street TORONTO, CAN. 10 Shuter Street Manufacturers and Importers DRAWING MATERIALS SURVEYING INSTRUMENTS SLIDE RULES, Etc. All the Latest Improved Styles of SLIDE RULES particularly THE MULTIPLEX. MACK PRECISION. . RIETZ UNIVERSAL. . FULLER THE HALDEN CALCULEX SEXTON'S OMNIMETERS Complete 475 Page CATALOGUE sent on request to DEALERS or PROFESSIONALS of Good Standing.