Excerpt from The Chief Injurious Scale-Insects of Connecticut This scale is circular, usually greenish yellow in color, and has a glassy appear ance. It forms a pit or depression in the bark where it is situated, and it is about 2 mm in diameter. (see Figure This species has been sent to the Station several times on English oak, Quercus robur, though it is known to attack other oaks. Kerosene emulsion and whale oil soap have been used as a Spray with good results in destroying this insect. 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.