SCIENCE IN THE INDUSTRIAL WORLD 



containing molten metal. Within the pot is a pump- 

 plunger leading to a perforated mouth arranged to close 

 the rear of the mold. When the matrix line is in posi- 

 tion the automatic operation of the plunger forces the 

 metal into the mold and against the line of matrix letters, 

 where it instantly solidifies in the form of a slug. The 

 mold wheel then makes a partial revolution, bringing the 

 mold in front of a blade which pushes the slug into a 

 receiving galley, ready for the proof press. 



"Having served their purpose in front of the mold, the 

 matrices are returned to the magazine to be utilized 

 in new combinations. The distribution is accomplished 

 automatically. The operation of the machine permits 

 the composition of one line, the casting of a second, and 

 the distribution of a third to be carried on simultane- 

 ously. The casting operation can also be arranged to 

 work independently of the rest of the machine. It is 

 said that this machine is capable of a speed greater than 

 that at which the most skilful expert can operate the 

 keys. The average product of a good operator is 4000 

 ems per hour. Many operators, however, can produce 

 from 5000 to 6000 per hour, and a speed of 13,000 is on 

 record." 



There is another machine, known as the "monoline," 

 that is operated in much the same way as the linotype. 

 In this machine "as the keys are struck on the key- 

 board the matrices and spacers descend into the as- 

 sembling box, traveling a distance of about four inches, 

 and the bars are dropped more or less, according to the 

 position of the letter to be brought in line to be cast. 

 When the line has been completed to approximately its 



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