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THE NATIONAL GEOGRAPHIC MAGAZINE 



A CLOTH -PRINTING MACHINE: LAWRENCE, MASSACHUSETTS 



To see white cloth entering one of these big presses and coming out at a speed of thou- 

 sands of yards an hour, with a dozen different colors, every one in perfect register, is to 

 realize how much science has done to give us attractive clothes. 



and complicated threading, but they need 

 not be described here. 



HOW THE CLOTH IS WOVEN 



In the weaving process for plain cloth 

 the one harness goes up as the other goes 

 down, so that the shuttle with the woof 

 passes under every other thread and over 

 the alternate ones. Next trip through it 

 passes over the ones it went under before 

 and under those it passed over. 



When a new lot of identical warp is 

 to be put into the loom, the slow process 

 of threading the harness is not resorted 

 to ; rather the ends of the old are knotted 

 to the ends of the new. 



To tie 2,000 knots is no mean job. It 

 is performed by a little machine that can 

 tie 240 knots a minute — four a second. 

 The ends of the threads of the old warp 

 are placed alongside those of the new 

 and the tying mechanism set in motion. 



