HISTORY AND HANDBOOK OF PHOTOGRAPHY

which gives us at such little cost the human visage in its exactitude, which presents to our eyes as in a mirror the scenery of distant lands, which lends its aid to all the sciences, which accompanies the astronomer into the depths of the heavens, the micrographer into the invisible world, and which even comes to the assistance of the besieged city, reducing its messages to the easy burden of a bird!

In studying the plan of this work, the author was impressed with the importance of the subject; in writing it, he experienced a deep admiration, which it has been his aim to impart to the reader. He has endeavoured to make his sketch at once a practical guide to the amateur photographer, and an attractive and instructive history, as is that of all scientific conquests when narrated with truth and sincerity.

In this second edition which follows so closely on the first, some gaps, which the development of the art rendered in some degree inevitable, have been filled up from the large number of new facts which have come to light.

G. T.

10 | Preface