Excerpt from A Practical Treatise on Caoutchouc and Gutta Percha: Comprising the Properties of the Raw Materials and the Manner of Mixing and Working Them; With the Fabrication of Vulcanized and Hard Rubbers, Caoutchouc and Gutta Percha Compositions, Waterproof Substances, Elastic Tissues, the Utilization of Waste, Etc In addition to the ingredients mentioned, which are utilized in various ways, milky juices of Certain plants (euphorbiaceae) contain virulent poisons, used by the negroes to poison their war implements. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.