1 Investigations On The Photographic Process 2 The Photographic Efficiency Of Heterogeneous Light 3 On The Theory Of The Characteristic Curve Of A Photographic Emulsion PDF Download

Excerpt from Investigations on the Theory of the Photographic Process It must be understood that the following pages are in no sense a text-book or an authoritative pronouncement on the theory of negative making, but simply a collection of certain investigations carried out in the past four years. A preface is frequently an apology for what follows, and to some extent this is the case with our own. For the possibly objectionable wealth of experimental details and results, it must be pleaded that the work was first presented in theses for degrees, and could not be subsequently cut down without a most radical alteration. Also, comprehensive and minute details, though frequently taking too much space for their publication in the ordinary journals, are sometimes of value to other investigators, who may draw from them other, and more correct, conclusions than their originators. We hope, however, that the work is sufficiently comprehensive to be of value to those photographers interested in the bases of their hobby or profession, to the experimental investigator in photography, and to the scientific student of photographic chemistry. In our investigations we have always endeavoured to deal with questions quantitatively, feeling that only in this way can any advance of permanent value be made. 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.