Excerpt from The Scientific Monthly, Vol. 10: January to June, 1920 Of the group of defects of the sense organs, about half were refractive errors of the eye, and one fourth were defects and diseases of the ear, including deafness. Tuberculosis gave a rate of 30 per constituting over per cent. Of the defects found. Venereal diseases gave a rate of 32, nearly per cent. Of the defects. 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.