OF KLKlTKIdTY. 



SECTION VII. 



Of M. De Luc's Aerial Electroscope, and the 

 Connexion observed between its Action and 

 other Atmospheric Phaenomena* 



IT may not be improper to present the 

 reader with a short account of M. De Luc's 

 Electric Column, or Aerial Electroscope, as 

 this instrument has been frequently alluded to 

 in my Journals. 



It is composed of a great number of small 

 circular and very thin plates, about the diameter 

 of a sixpenny piece of silver, of paper and of 

 zinc, alternately arranged, forming a column ; 

 the two ends of which are made to approximate, 

 and at each of them is attached a small bell ; a 

 metallic clapper is then hung between them, and 

 the whole apparatus is insulated by being fixed 

 on glass stands. One end of the column is 

 observed to become electrified plug, as it is 

 termed, and the other minus ; consequently, one 

 of the bells becomes electrified plug, or positive, 



* See Letters of M. De Luc on this Column in many 

 numbers of Phil. Journal, and in Phil. Mag. the present 

 month, Oct. 1814fp. 248. 



