Download or read book Evaluation of Synergists for Pyrethrum and Allethrin Against the Body Louse (Classic Reprint) written by Philip Hartshorn Clark and published by Forgotten Books. This book was released on 2017-11-12 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Evaluation of Synergists for Pyrethrum and Allethrin Against the Body Louse Of the 796 compounds tested, 293 caused at least 75 percent mortality, and 192 gave 100 percent mortality When used in combination with pyrethrins at percent. The effective synergists and their identifying ent numbers are listed on pages 5 11 and the ineffective compounds on pages 12-22, The following compounds caused at least 75 percent mortality alone; consequently their effectiveness as synergists was not clearly indicated. 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.