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RICHARD CŒUR DE LION AND HIS FLEFT ON THE WAY TO THE HOLY LAND.

THE THREE-COLOUR PROCESS OF PRINTING

The above shows the three separate printings which when printed one on top of the other produce the complete picture. The blocks are prepared by photography, as explained in Chapter X. The above illustration has been taken from The Crusaders, by Professor Alfred J. Church.

THE

MARVELS

OF

PHOTOGRAPHY

DESCRIBING ITS DISCOVERY & MANY
OF ITS ACHIEVEMENTS

BY

CHARLES R. GIBSON, F.R.S.E.

AUTHOR OF

"

"THE ROMANCE OF MODERN ELECTRICITY," ELECTRICITY OF TO-DAY,"
"SCIENTIFIC IDEAS OF TO-DAY," &c., &c., &c.

WITH OVER THIRTY ILLUSTRATIONS

LONDON

SEELEY, SERVICE & Co. limited

38 GREAT RUSSELL STREET

THE MARVEL LIBRARY

A SERIES OF INTERESTING BOOKS FOR YOUNG PEOPLE DESCRIBING THE WONDERS OF SCIENCE

AND NATURAL HISTORY

Illustrated. Extra Crown 8vo

THE MARVELS OF SCIENTIFIC INVENTION. By THOMAS W. CORBIN, Author of Engineering of To-day," "The Romance of Submarine Engineering," &c., &c.

THE MARVELS OF AVIATION. BY CHARLES C. TURNER (Lieutenant, R. N. V. R.), Author of "Aircraft of To-day," &c., &c.

MARVELS OF GEOLOGY. By E. S. GREW, M.A., sometime Editor of Knowledge, Author of "The Far East," &c., &c.

MARVELS OF PHOTOGRAPHY. BY CHARLES R. GIBSON, F.R.S. E., Author of "Scientific Ideas of To-day," &c., &c.

SEELEY, SERVICE & CO. LIMITED

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I

PREFACE

T is not the author's purpose in the present volume to

give any instruction in the practice of photography.

There are many useful works dealing with the practical side of the subject. His object is to tell the romantic story of the discovery of this wonderful art, and the steps by which its range has been extended until it can achieve results which only a few years ago would have been thought impossible. A glance at the list of chapters will show what a wide field photography now covers, and what service it renders to man, both in his everyday life and in his most subtle scientific researches.

The story has been told in the most readable form that the author could give it; but in an Appendix will be found a record of the successive incidents in the history of the invention, with the dates, and the names of the inventors, in a shape convenient for reference.

The author is indebted to many friends for interesting information and references. Among these are Professor Korn, of Munich University; Professor Reiss, of Lausanne University; Professor Muir, of the West of Scotland Technical College; J. Craig Annan, William Lang, Patrick Falconer, and John Trotter, of Glasgow.

The author is indebted to the following gentlemen for very kindly reading the proof sheets of the chapters re

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lating to their special subjects: Dr. John G. McKendrick, F.R.S. (Emeritus Professor in the University of Glasgow), H. Stanley Allen, M.A., B.SC. (Senior Lecturer in Physics, King's College, University of London), Dr. R. M. Buchanan (Bacteriologist to the City of Glasgow), Dr. J. Robertson Riddell (Royal Infirmary, Glasgow), W. B. Hislop (Lecturer on Process Work, Heriot Watt College, Edinburgh), and Inspector Stedman, New Scotland Yard (London),

In connection with the illustrations the author is indebted to Professor Korn, Professor Reiss, Edgar Senior (Battersea Polytechnic), Dr. W. J. S. Lockyer (Solar Physics Observatory), Dr. Vaughan Cornish, Arthur E. Smith, Richard Kerr, F.R.A.S., the Authorities at New Scotland Yard, London, the Criminal Investigation Department, Glasgow, and the West of Scotland Amateur Photographic Association. Also to the Librarian of Glasgow University, Dr. R. M. Buchanan, Charles Stewart, Alexander McGrouther, R. Brinkley and Sons, John Trotter, Glasgow; Rev. J. B. Thomson, Greenock; and the Neue Photographische Gesellschaft, BerlinSteglitz.

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