A Wonder Book of Rubber

African rubber Akron Amazon automobile tire B. F. Goodrich Company baking industry baking powder bark Barytes Benjamin Franklin Goodrich biscuits boot Brazil building Cahuchu carcass Central America Ceylon Charles Goodyear commercial compounding ingredients cord cotton fabric dipped discovered discovery dough experience facturer finished article flour garden hose gathered and coagulated grades Guayule hand handled hard rubber heat Hevea tree hundred incision Indian LANDOLPHIA latex layer machine mammoth manu manufacture material miles MILL ROOM mixed molded native Palmer-Web patent perhaps plantation industry plantation rubber planter pound powder practically process of vulcanization produce protect raw rubber resiliency rubber articles rubber belting rubber chemist rubber companies rubber compound rubber gatherers rubber industry rubber plant rubber tire shoes Silvertown soapstone South America steam sulphur talc tapping tennis ball thick thin Thomas Hancock tire is built TRADE MARK tread varieties vulcanite water bottle waterproof clothing