of experimenting he was about ready to confess that the obstacles were insurmountable. One night in 1846, while still in this mood, he resumed his experiments; the more he reviewed the problem, the more difficult it seemed. In despair he was about to give it up for the night, when there flashed across his brain a plan for securing the type on the surface of a cylinder. This was the solution of the problem, and within a year our leading newspapers had their "Lightning" presses, in which from four to ten cylinders were used to feed sheets of paper against the surface of the type as it flew around. So recently as 1870 the ten-cylinder Hoe press, printing twenty-five thousand sheets an hour, was considered a marvel. Then came the perfecting press, a far smaller machine, but capable of five times as much work, thanks to the substitution of rolls of paper for separate sheets fed in one by one. The device by which the web of paper after being printed on one side is turned over and printed on the other side in the same machine was another triumph of American ingenuity. Stereotyping made it possible to print from a dozen presses at the same time without the trouble of setting up new type, and inventions for pasting, folding, and counting the papers still further increased the speed at which papers may be issued, while at the same time decreasing the number of men employed as pressmen. In 1865 it required the services of twenty-six men and boys to print and fold twenty-five thousand copies of an eight-page paper in an hour. To-day a perfecting press, with the aid of four men, does four times as much work. It has been recently estimated that to print, paste, and fold the Sunday edition of one of the great newspapers with the machinery of 1865 would require the services of five hundred persons. THOMAS W. HARVEY AND SCREW-MAKING. The gimlet-pointed screw patented in 1838 by Thomas W. Harvey, of Providence, R.I., is a marked instance of an improvement so useful that we can scarcely realize that less than fifty years ago such screws were unknown to the carpenter, for it was not until 1846 that Harvey succeeded in getting people to abandon the old blunt-ended screw that we now occasionally find in buildings put up before 1850. Harvey was a Vermont boy, born in 1795. His faculty for the invention of machinery for screw-making and other purposes gave him and his associates and successors--Angell, Sloan, and Whipple--great fortunes according to the estimate of that day. He died in 1856. C.L. SHOLES AND THE TYPEWRITER. [Illustration: C.L. Sholes.]