Excerpt from The Use of Aromatic Solvents for Control of Submersed Aquatic Weeds in Irrigation Channels Thorough dispersion of the chemicals in the water before coming into contact with weed growth was of utmost importance. Aromatic solvents are lighter than water. Unless completely dispersed, the emulsions did not extend to the bottom of the channel but tended to break up more rapidly, allowing the solvent to rise to the surface and evaporate. With conventional spray units, the introduction of chemicals im mediately above a weir or other structure, with a considerable drop and turbulent pool, usually promoted adequate dispersion (fig. In the absence of such structures, compressed - air booms, attached to large compressor units. And placed in the water immediately below the spray boom, provided agitation and chemical dispersion. The advantage of mixing the aromatic solvents with water prior to intro duction under high pressure has already been discussed in the section titled Equipment for Application. 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.