460 Rev. N. S. Heineken on the Galvanic Shock- Multiplier. 



mathematics. His poetic compositions are full of taste and 

 feeling ; and his Latin compositions are remarkable for ele- 

 gance and purity. In this respect, indeed, he combined 

 qualities, powers and taste which are scarcely recorded to 

 have been coexistent with his high mathematical faculties, in 

 any other man." 



LXIII. Description of the Galvanic Shock- Multiplier. By the 



Rev. N. S. Heineken.* 

 HPHE drawing represents an apparatus for producing a 

 -■■ rapid succession of shocks when used with the galvanic 

 pile or battery, and may be called the Galvanic Shock-Multi- 

 plier. The idea was derived from the revolving armature of 

 the magnetic battery ; but I am not aware that anything of the 

 same kind has been applied to the ordinary galvanic battery. 



Description. 

 A is a thin wheel of copper having four or more circular 

 indentations at equal distances 

 in its circumference. It is fasten- 

 ed by a nut at B to a spindle 

 which passes through the brass 

 tube C, and has at its other end 

 a pulley D. The tube is insu- 

 lated by means of the glass pil- 

 lar E F fixed into the wooden 

 support F G, and by this at- 

 tached to the base. H a wheel 

 by turning which the pulley D 

 and disc A revolve. I K two 

 brass arms attached by mount- 

 ings to glass tubes at L and M, 

 and by them insulated and fixed 

 also to C E. These two brass 

 arms hold the copper wires N O 

 by means of the screws P P. The wire N has its end formed 

 into a slight spring; so also has O. That at N touches the 

 copper disc A only where the circumference is entire ; that at 

 O always presses lightly on the face of the disc. The mode 

 of operation of the apparatus will be sufficiently obvious. If a 

 wire having a moist sponge be attached to one extremity while 

 the other is connected with one of the poles of a battery, and 

 the hand grasp the moist sponge, and if the other pole of the 

 battery be connected by a wire with N, the other hand grasping 



* Communicated by the Author. 



