MECHANICAL EFFECTS OF THE DISCHARGE. 641 



near together a spark passes between them in the water, 

 and the water is violently agitated. If the jar can 

 only be charged by an electrophorus, the contrivance 

 represented in fig. 332 may be used ; with a stronger 

 charge that shown in fig. 333 should be employed. 



FIG. 332 (an. %roj. ; \ real size). 



In fig. 332 a glass plate, which is clamped horizontally 

 in the retort-stand, carries two wires each with a ring at 

 one end; their other ends are filed round and arranged 

 at a distance of only O mm *5 from each other. These 

 ends are surrounded by a small wall of sealing-wax, 

 which forms a shallow vessel into which water may be 

 poured. By means of the discharger and two chains the 

 discharge is made to take place in the usual manner, and 

 when the charge is strong a drop of water is projected 

 upwards -to. a considerable height. 



Fig. 333 represents a small glass vessel which carries 

 upon its sides two clamps made 

 of wire. The ends of the wires 

 in the water are doubled back 

 and are only about l mm from 

 each other. The vessel filled 

 with 'water is placed upon the 

 table of the universal discharger, whose metallic rods 

 are brought into contact with the clamps on both sides. 

 When the discharge takes place, then, according to its 

 strength, the water may be set into a more or less strong 

 undulatory motion, or a portion may be thrown out of 



T T 



FIG. 333 (\ real size). 



