"What is it? I'm not very good at getting mechanical drawings. It looks as though it ought to be very important from all the wheels," he said, with a smile of interest. Spreading out the largest of his drawings, old Barton pointed out the different lines. "This may look like a mince pie of cogs here, but when it is put into shape it will be a simple little arrangement. This is a recording instrument which combines the phonograph and the dictagraph. One purpose--the most practical, is that a business man may dictate his letters and memoranda while sitting at his desk, in his office, instead of having a machine with a phonograph in his private office taking up space and requiring the changing of records by the dictator--which is necessary with the present business phonograph. All that will be necessary is for him to speak into a little disc. The sound waves are carried by a simple arrangement of wiring into his outer office, or wherever his stenographer works. There, where the space is presumably cheaper and easier of access than the private office, the receiving end of the machine is located. Instead of one disc at a time--limited to a certain number of letters--the machine has a magazine of discs, something like the idea of a repeating letter. Automatically the disc, which is filled, is moved up and a fresh disc takes its place. This goes on indefinitely, as you might say. A man can dictate two hundred letters, speaking as rapidly as he thinks. He never has to bother over changing his records. The girl at the other end of the wire does that when the machine registers that the supply is being exhausted. She in turn uses the discs on the regular business phonograph, or, as this is intended for large offices, where there are a great many letters, and consequently a number of stenographers, she can assign the records to the different typists." "Why, that is wonderful, Mr. Barton!" exclaimed Burke. "It ought to make a fortune for you if it is backed and financed right. Why didn't anyone think of it before?" Barton smiled, and caressed his drawing affectionately. "Mr. Burke, the Patent Office is maintained for men who think up things that some fellow should have thought of before! The greatest inventions are apparently the simplest. That's what makes them hard to invent!" He pointed to another drawing. "That has a business value, too, and I hope to get the proper support when I have completed my models. You know, a scientific man can see all these things on the paper, but to the man with money they are pipe dreams until he sees the wheels go 'round." He now held out his second drawing, which was easier to understand, for it was a sketch of his appliance, showing the outer appearance, and giving a diagonal section of a desk or room, with a wire running through a wall into another compartment.