PRINTING AND MAKING OF BOOKS 



of obtaining most accurate register in printing from the 

 roll, and that the number of impressions, or colors, could 

 be increased to advantage." At the present time these 

 great rotary color-printing machines have been brought 

 to a stage of perfection so that from ten to twelve colors 

 are now printed at a single journey through the press, 

 at the rate of about 100,000 copies an hour. 



OTHER AIDS TO THE PRINTER 



It should not be understood that it was simply in 

 the matter of presses that the publishing world made 

 giant strides of progress in the latter half of the nine- 

 teenth century. Indeed, had there not been a cor- 

 respondingly rapid development in other fields, the 

 great rotary presses would have been of little account. 

 For such presses must be fed, not only with paper and 

 ink, but with ever changing type, which, if set by the 

 slow hand-method, piece by piece, would not keep the 

 greedy rotary monsters supplied. But fortunately the 

 invention of devices for setting type rapidly was keep- 

 ing pace with the capacity of the presses to use them. 



As everyone knows, the old method of setting type 

 the only one known until two decades ago was that 

 of picking out each individual type by hand, and plac- 

 ing it in a certain position on a special device for holding 

 it, called a "stick." The limit of speed of type-setting, 

 therefore, was governed by the capacity of the indi- 

 vidual type-setter, or the number of men employed. 

 There was no means of hastening the process except 

 by increasing the number of men. But with the im- 



