OCR Text |
Show Grow Rubber in United States. Heretofore it was supposed that Mexico, with its Guayule rubber-bearing shrub, had a monopoly on this continent of the production of rubber. The survey now being made by the . University of California, however, has located more than twenty varieties of , bushes, five of them far surpassing in quality, if not quantity, the Guayule, wholly within the United States proper. prop-er. Already shrubs estimated to contain con-tain more than 300,000,000 pounds of best quality rubber have been largely large-ly mapped, says Motor. |