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Excerpt from Use of Toxic Gases as a Possible Means of Control of the Peach-Tree Borer As already. Stated, the essential idea of the experiments involves application of volatile toxic compounds to the soil at the base of the trees. In one experiment small tents were used to confine the gas, but this method, on account of the mechanical difficulties involved, was never used to any great extent. The soil under all ordinary condi tions proved a fairly satisfactory container for the gas. Whether the material-was applied in water solution 'or in its original form de pended upon its chemical properties. Whenever possible both methods of application were adopted. When applied either in solu tion or suspended in water, a trench was dug about the collar of the tree as for worming and the required dose, in from 1 to 2 gallons of water, puddled about the trunk, after which the soil was replaced and compacted. When applied in its original state the material, if a liquid, was poured into the soil about the collar, and if a solid, was buried in the surface soil about the trunk. 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.