India rubber world . rld when you write. TIRE FABRICS NOT INJURED BY OIL It wont costyou a cent to testRoyal WorcesterBelting. We will send sample belt for testing on your ownmachinery, absolutely free of cost to you. Putsyou under no obligation whatever to buy unlessyou decide for yourself that it is the best and mosteconomical belt for you to use. REMEMBER: Royal Worcester Belts—choicest selection ofhides tanned old-fashioned, pure oak process, cut notover 18 inches from centre, nor more than 54 incheslong. Guaranteed not to stretch, sag, or give trouble. GRATON d. KNIGHT MFG. CO., Oak Leath


India rubber world . rld when you write. TIRE FABRICS NOT INJURED BY OIL It wont costyou a cent to testRoyal WorcesterBelting. We will send sample belt for testing on your ownmachinery, absolutely free of cost to you. Putsyou under no obligation whatever to buy unlessyou decide for yourself that it is the best and mosteconomical belt for you to use. REMEMBER: Royal Worcester Belts—choicest selection ofhides tanned old-fashioned, pure oak process, cut notover 18 inches from centre, nor more than 54 incheslong. Guaranteed not to stretch, sag, or give trouble. GRATON d. KNIGHT MFG. CO., Oak Leather Belt Makers, Worcester, Mass. mention The India Rubbe. World when <iu write The STURTEVANTSYSTEM. RUBBER DRYING is rendered positive by a forced circulationof warm air. The time is reduced one-halfand the product improved. The same sys-tem, giving thorough ventilation, is used for heating fac-tory buildings,offices, etc. B. F. STURTEVANTCOMPANY, BOSTON, MASS. New York. London. 284. Mention The India Rubber World when you write. Vulcanizers of all sizes, CRLENDERS, GRINDERS. JTliXERS AND WISHERS, Hydraulic and Screw Presses,Hydraulic Pumps and Accumulators. THOS. F. STEVENSON, 120 LIBERTY ST., NEW YORK. Correspondence solicited. Several second-hand Calender? and1 Grinders for sale. Mention Tlie India Rubber World when you vrrile. RUBBER SUBSTITUTES. Our Proofing Substitute is recognized and adopted as Standard by the MAKE ALL KINDS OF SUBSTITUTE TO ORDER—A SPECIALTY. BONNER MANUFACTURING CO., 160=162 High Street, Boston, Mass. Aleut;,,i, The India Rubber World when you write. April i, 1903.] XLI STJN. HON. TTJES flMiblisberspacic cA VISIT TO THE RUBBER PLANTATIONS. Beginning with the May issue of The India RubberWorld, there will appear the first of a series of articles,entitled A Trip Through the Tierra Caliente, which willbe a record of the personal observation of the Editor din-ing a recent trip to the rubber plantations in southernMexi


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