315 ELECTRIC VEHICLES December, 1913. From Rubber Tree to Tires Some of the Processes Used in Finishing Raw Material BY CHARLES C. HAVILL THE Amazon Valley is promi- The rubber is then passed to the breakers, which crush and^ masti- nent as a source of supply cate the lumps between for the rubber … into thin, porous sheets, trees, tapped by small incisions made with a so that the greatest Scene on a Ceylon Plantation. hatchet, tin cups collect possible surface is ex- the "latex" — milk-white, and somewhat resembling cream. posed to the air in order to cause rapid drying. As moisture has a…
Automobiles, Electric · Electric vehicles
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
