Developments in telephotography

Transmitting photographs, drawings, maps, etc., by wire or wireless is a problem to which a solution is near at hand, and the present paper is given anticipating the addition of this to our already long list of applied sciences. A brief history is given of the early beginnings, and some of the modern methods discussed; among the latter being Korn´s and Belin´s. The Leishman systems are discussed at length because the author has been particularly interested in their development and has been in intimate contact with both inventor and inventions. In the present paper it is hoped that interest of the American engineer may be stimulated in this subject to the end that a successful solution might rightfully be attributed to American genius.