ELECTRICAL INVENTIONS 



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can be mounted on the tool itself as on the drill, the planer, the 

 sewing-machine (Fig. 102), the wringer, the vacuum cleaner, 



FIG. 102. The motor on a sewing machine. The light machine stands on 

 any table. The wires to the motor come from an ordinary electric-light socket, 

 running through a control switch operated by the foot. This switch is here shown 

 beside the machine. 



FIG. 103. A vacuum cleaner 



etc. (Fig. 103). The power can be carried by flexible wires al- 

 most anywhere and to great distances from the central generating 



