ELECTRICAL APPARATUS. 



281 



action, a stream of fluid will issue from each point, and pro- 

 duce a locomotion in the fly, propelling it in a direction con- 

 trary to that of the points : the points will of course appear 

 luminous, and if the room be darkened, a beautiful circle of 

 fire will be distinctly seen, formed by the revolution of the fly. 



Price, $0.50 to $1.00. 



Revolving Horsemen. (Fig. 

 314.) This is a very pleasing 

 experiment; it consists of a 

 swelled glass pillar, mounted 

 on a mahogany stand, having 

 a cap terminating in a point, on 

 which is balanced an electrical 

 flyer about twelve inches wide, 

 as described Fig. 313 ; to each 

 of the points is attached small 

 figures of horsemen; to the 

 cap is attached a hook for con- 

 necting with the prime con- 

 ductor, which, when excited, 

 will cause the horsemen to re- 

 volve with great rapidity. 



Price, with 4 horse- 

 men, 

 " 6 " $3.00. 



!.50. 



Fig. 314. 



Set of Electrical Flyers 

 (Fig. 315), consisting .of five 

 mounted ; one in the centre, 

 and four on branches from the 

 centre. 



They sometimes are made 

 having one large flyer, and 

 four small ones, revolving on 

 the revolving flyer, causing re- 

 volutions within revolution. 

 Price, $4.50. 

 24* 



Fig. 315. 



