PAGE 10
The Forger
by
“Any word from Chicago yet?” appealed an anxious voice from the doorway.
We turned. There were Carroll and Williams who had come for us with an automobile to go over to watch at the wharf in Brooklyn for our man. It was Carroll who spoke. The strain of the suspense was telling on him and I could readily imagine that he, like so many others who had never seen Kennedy in action, had not the faith in Craig’s ability which I had seen tested so many times.
“Not yet,” replied Kennedy, still busy about his apparatus on the table. “I suppose you have heard nothing?”
“Nothing since my note of last night,” returned Williams impatiently. “Our detectives still insist that Bolton Brown is the man to watch, and the disappearance of Adele DeMott at this time certainly looks bad for him.”
“It does, I admit,” said Carroll reluctantly. “What’s all this stuff on the table?” he asked, indicating the magnets, rolls, and clockwork.
Kennedy did not have time to reply, for the telephone bell was tinkling insistently.
“I’ve got Chicago on the wire,” Craig informed us, placing his hand over the transmitter as he waited for long-distance to make the final connection. “I’ll try to repeat as much of the conversation as I can so that you can follow it. Hello – yes – this is Kennedy. Is that you, Clark? It’s all arranged at this end. How’s your end of the line? Have you a good connection? Yes? My synchroniser is working fine here, too. All right. Suppose we try it. Go ahead.”
As Kennedy gave a few final touches to the peculiar apparatus on the table, the cylindrical drum before us began slowly to revolve and the stylus or needle pressed down on the sensitised paper with which the drum was covered, apparently with varying intensity as it turned. Round and round the cylinder revolved like a graphophone.
“This,” exclaimed Kennedy proudly, “is the ‘electric eye,’ the telelectrograph invented by Thorne Baker in England. Clark and I have been intending to try it out for a long time. It at last makes possible the electric transmission of photographs, using the telephone wires because they are much better for such a purpose than the telegraph wires.
Slowly the needle was tracing out a picture on the paper. It was only a thin band yet, but gradually it was widening, though we could not guess what it was about to reveal as the ceaseless revolutions widened the photographic print.
“I may say,” explained Kennedy as we waited breathlessly, “that another system known as the Korn system of telegraphing pictures has also been in use in London, Paris, Berlin, and other cities at various times for some years. Korn’s apparatus depends on the ability of the element selenium to vary the strength of an electric current passing through it in proportion to the brightness with which the selenium is illuminated. A new field has been opened by these inventions which are now becoming more and more numerous, since the Korn system did the pioneering.
“The various steps in sending a photograph by the Baker telelectrograph are not so difficult to understand, after all. First an ordinary photograph is taken and a negative made. Then a print is made and a wet plate negative is printed on a sheet of sensitised tinfoil which has been treated with a single-line screen. You know a halftone consists of a photograph through a screen composed of lines running perpendicular to each other – a coarse screen for newspaper work, and a fine screen for better work, such as in magazines. Well, in this case the screen is composed of lines running parallel in one direction only, not crossing at right angles. A halftone is composed of minute points, some light, some dark. This print is composed of long shaded lines, some parts light, others dark, giving the effect of a picture, you understand?”