OF ARTS AND SCIENCES. 



199 



Tables VIII. and IX. sliow results obtained by using a single eon- 

 denser, whose plates were parallel to the lines of magnetic force. The 

 condenser was made of forty copper strips, 6 mm. wide and G cm. long, 



TABLE VIII. 



TABLE IX. 



insulated by paraffined paper. The poles of the magnet were 10 mm. 

 apart. In both of these tables the establishment of a magnetic field is 

 seen to produce a diminution in the capacity of the condenser of about 

 5 per cent. 



A series of experiments (see Table X.) made with a mica condenser, 

 placed in the field with its plates perpendicular to the lines of magnetic 

 force and with the poles 10 mm. apart, showed that its capacity was 

 increased by about 5 per cent. 



