274 BENJ. PIT Vs, JR., DESCRIPTIVE CATALOGUE. 



Fig. 300 



Fig. 298. 



;hole. To use, the cross is connected by a chain with the 

 mme conductor, when a pleasing chime will commence. 



Price, $4.00. 



French Arrangement for illustrating the Chiming of Bells 

 by Electric Action. Fig. 299 represents the apparatus, one 

 of the bells being in connexion with the interior coating of a 

 Leyden jar, while the other bell communicates with the 

 outer coating. When the jar is moderately charged, the 

 vibration of the little ball, which is suspended between the 

 bells by a dry filament of silk, produces the chiming, which 

 is more or less rapid as the distance between the bells is in- 

 creased or decreased. Price, $4.00. 



Electrical Plates for Dancing Images. Fig. 300, as above, 

 consists of a metallic plate six or eight inches in diame- 

 ter, supported on a stand, and another plate of somewhat 

 smaller size, suspended to the prime conductor at about 

 three or four inches distant. Place on the lower plate any 

 little figures cut out of paper or pith. Take care that the 

 lower plate is supported upon some conducting substance ; 

 turn the machine, and the figures will raise themselves, and 

 fly up and down between the two plates, forming a most 

 ludicrous dance. 



Support the lower plate upon a glass bottle, or other 



