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Excerpt from Catalogue of Surgical Instruments As represented in the cut, the glass cylinder is encased in a metal mounting, fenestrated to show' the graduations for minims. No cement is used to fasten the parts to each other, but in its stead there are washers at each extremity of the cylinder, which not only insure the exclusion of air, but effectually prevent the annoyance of the glass becoming loose. The instrument can be taken apart for cleaning by simply unscrewing the nut through which the piston plays. The piston is made longer than the cylinder, to allow of the washer being pushed through far enough to be freshened, oiled, &c., Without the trouble of getting at it in the old way. 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.