ELECTRIC GENERATORS. 



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warping, with the insulation and elegant finish of the 

 wood. The driving wheel is of ebonite and the iron 

 casting, on which it is mounted, slides in grooves on an 

 iron plate, and is moved by the adjusting screw 0, to 

 regulate the tension of the belt. 



Fig. 38 Atkinson's Four-Plate Topler Machine Front View. 



The ebonite insulators, which support the plate J9,have 

 soft rubber packing, to ease the pressure on the glass. 



The conducting rods of the Leyden jars pass through 

 ebonite caps with cork attached underneath, which 

 gives them a fixed vertical position, and affords firm 

 support to the sliding-rods and the combs connected 

 with them above. 



