SCIENCE IN THE INDUSTRIAL WORLD 



and the grippers close upon it before the cylinder 

 starts, thus insuring the utmost accuracy of register. 

 After the impression, the sheet is transferred to a 

 skeleton cylinder, also containing grippers, which re- 

 ceives and delivers it over fine cords upon the sheet 

 flyer, which in turn deposits it upon the table. The 

 distribution of the ink is effected partly by a vibrating, 

 polished, steel cylinder, and partly upon a flat table at 

 the end of the traveling bed, the number of form-inking 

 rollers varying from four to six. This is without doubt 

 the most perfect flat-bed cylinder printing-machine 

 that has ever been devised." 1 



But this type of cylinder press, while able to pro- 

 duce the best kind of work, is comparatively slow 

 too slow for the demands of the newspapers, which are 

 forever crying for more speed. The best that the old- 

 style cylinder press could do was only about two 

 thousand impressions per hour, or about as fast as the 

 feeder could lay the paper in place. This was of course 

 altogether too slow, and a double-cylinder machine was 

 tried, in which the bed was lengthened so that it was 

 acted upon by two cylinders, and upon which two feeders 

 worked. But even with this machine only four thou- 

 sand sheets printed on one side could be produced per 

 hour, and this was still far below the requirements. 



THE ADVENT OF THE "TYPE-REVOLVING MACHINE" 



It is a curious fact in the history of invention that 

 great discoveries have frequently followed closely upon 

 the announcement from authoritative sources that 



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