MARCUS J. MARTIN
SECOND EDITION
REVISED AND ENLARGED 1919
THE WIRELESS PRESS, LTD.
12-13 HENRIETTA STREET, STRAND
LONDON, W.C. 2
PREFACE TO SECOND EDITION
Although during the last few years very little, in common with other wireless work, has been possible in connection with the practical side of the wireless transmission of photographs, yet, now that the prospect of experimental work is once again occupying the minds of all wireless workers, advantage has been taken of a reprint of this little volume to amplify a few points that were insufficiently dealt with in the first edition, and also to add some fresh matter.
To Chapter V. has been added a short description of the Nernst lamp, and also some useful information regarding photographic films, and a few notes relating to enlarging included in the Appendix B.