64 THE POPULAR SCIENCE MONTHLY. 



lie will go on with, and wlien the watch is completed that, too, 

 will be his owd. 



He is then taught to make other fine tools, and to finish the 

 frame, ready to receive the wheels. 



Then he will leave the first room, and pass up into one where 

 he is taught to fit the stem-winding parts, and to do other fine 

 cutting and filing by hand, to niiake watches that will strike the 

 hour, minute, etc., for which class of work the Swiss are so 

 famous. One can readily conceive how exceedingly minute and 

 exact such workmanship must be, particularly on the minute 

 snail that is, the guide which permits and arrests the striking, 

 so that, in addition to the hour and the quarter, the very minute 

 shall be sounded. 



The master in this room had been thirty-eight years in that 

 office, directing, inspecting, criticising, and it was interesting to 



/C\ 



2 (or center). 

 Fig. 2. Wheels of Train. 



observe that his eyesight was still perfect, a fact which tends to 

 confirm the statement sometimes made that it is rare to find a 

 working jeweler an inmate of an eye infirmary. 



When the student has mastered the work on these fine file- 

 dressed parts, he is ready to pass on into the train room i. e., the 

 room in which the wheels are cut. Here he will be taught how 

 to handle the beautiful little machines which cut the cogs. Some 

 of them are so fine that they can be adjusted to cut twenty-four 

 hundred cogs on one small wheel. 



In this room are to be seen large working models of watch 

 movements, jjerfect watches in every respect though large as a 

 saucer, which enable the student to study very important matters 

 of the angles of cogs, the bearing and adjustment of the matched 

 parts, etc. Many of the numerous jewelry shops over the city 

 have these mammoth watch movements running in the windows 

 as a means of engaging the attention of the passer-by of mechan- 

 ical tastes. 



The next step upward is into the escapement room, where 

 those steel parts that constitute the escapement the scape-wheel, 

 lever, and balance are cut (see Figs. 4, 5, G). 



