Excerpt from Secrets of the Dark Chamber: Being Photographic Formulæ, at Present Practiced in the Galleries of Messrs. Gurney, Fredericks, Bogardus, Etc., Of New York City, Never Before Published My object in presenting this work has been to gather up the knowledge of our most experienced and successful photographers, and impart it to those who have less opportunities to get the improvements. 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.