Firestone Rubber Plantation In 1926 Harvey S. Firestone pioneered the clearing of African jungles located in Liberia, within four degrees of the Equator, and developed there a huge 55,000 acre rubber plantation, which contains 7,500,000 rubber trees. In the Firestone Factory and Exhibition Building are life-like dioramas showing every step in the gathering and preparing of the latex (liquid rubber) on these plantations, prior to shipment of the rubber to the United States for the manufacture of tires and other rubber products.