Excerpt from A Half Century of Public Health: Jubilee Historical Volume of the American Public Health Association; In Commemoration of the Fiftieth Anniversary Celebration of Its Foundation New York City, November 14-18, 1921 The American Public Health Association has been fortunate, not only in having come into existence at an opportune time, but also in having lived during a period made notable for all time by remarkable discoveries in every branch of science. Wonderful in themselves as these discoveries have been, their Chief value has lain in their useful ness to man. In no field have more remarkable advances been achieved than in medicine, both curative and preventive. Both have been revolutionized; knowledge has replaced guess-work; experiment has superseded empiricism and superstition; medicine has become a science rather than an art, all through the brilliant researches begun by Pasteur, and carried on by Koch and a host of earnest workers who followed in their footsteps. 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.