September 17, 1886.] 



SCIEI^CE. 



253 



in the matrix. The cam contmues to revolve, the 

 type drops back into place, the wheel is released 

 and continues its rapid motion, and the carriage 

 moves into position for the next letter, the whole 

 operation being practically instantaneovis, and the 

 rapidity of working being limited only by the skill 



and the last letter is struck. The ' feed ' of the 

 carnage is then reversed, and the rest of the line 

 filled in backward. This is done so that the ends 

 of the lines may be even, as the spacing between 

 the words is not automatic, but depends alto- 

 gether upon the skill and accuracy of eye of the 



THE STANDARD TTPOGRAPH. 



of the "operator and the speed of the treadle. 

 The next letter is produced in the same way ; and 

 so on to the end of a word. Then the carriage is 

 moved ahead sufficiently for the space desired by 

 touching an appropriate space-key. This is con- 

 tinued until within two or three words of the end 

 of the line, when the carriage is run on to the end, 



operator. One Line finished, the carriage is re- 

 turned to the starting-point, the line-spacing key 

 is struck, bringing the matrix into position for the 

 next line, and the various operations are repeated. 

 "When the matrix is completed, it is removed from 

 the carriage, and an electrotype taken ; and 

 this electrotype is supposed to take the place of 



