ELECTRICAL APPARATUS. 



289 



Fig. 327. 



Fig. 323. 





Electrical Windmill. (Fig. 328, as above.) This con- 

 sists of a house made of wood, having up its centre a wire, 

 the lower end fitting a hole in the conductor of an electrical 

 machine, the upper end supporting a pivot, put crossways, 

 so that its end projects through the mill, bearing the sails, 

 which are of paper or pasteboard, a fine wire running 

 along the back and end of each, having a point projecting 

 beyond the outer edge ; upon turning the machine the mill 

 will revolve rapidly. Price, $5.00. 



Fig. 329. Fig. 330. 



Electrical Cross. (Fig. 329.) This is a cross formed of 

 two thin leaves of talc, on which are fastened spangles of 

 tin-foil nearly touching each other and having a wire point 

 at each end ; the cross supported delicately on a suitable 

 support. Price, $2.50. 



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