BENJ. PIKE S, JR., DESCRIPTIVE CATALOGUE. 



Fig. 344. 



Electrical Mortars. 

 (Fig. 344.) These are 

 formed as the preceding, 

 only in the shape of a 

 mortar. 



Price, $3.00. 



Fig. 345 



Electrical Pistol (Fig. 345.) 

 The simplest and best form of the 

 hydrogen pistol is seen in the cut. 

 It consists of a tube of brass, 

 about an inch in diameter, and eight inches long, fastened 

 on to a baked wooden handle, shaped like that of a common 

 pistol. Where the trigger is ordinarily placed, is a short 

 ivory tube, which fastens into the brass tube, so as to reach 

 about half way across it. This piece of ivory is pierced so 

 that a wire may pass through it. The inner part of the 

 wire is at a small distance from the inner part of the top of 

 the tube, and the outer end of it is terminated by a small 

 ball. If then a spark be taken by the barrel, and at the 

 same time that the linger touches the ball of the trigger, a 

 spark will pass from the tube to the point of the wire inside, 

 and thence to the trigger to the hand. 



Price, $2.00 and $3.00. 



Fi &- 316 - Apparatus for Firing Gun- 



powder by the Electrical Spark 

 (Fig. 346) consists of a ma- 

 hogany base, about six inches 

 long and four wide, supporting 

 two insulating glass pillars ; to 

 the one is attached a bent wire, 

 terminating in a small brass 

 ball, and the other a wooden 

 cup for the powder, each hav- 

 ing a crook for attaching a 

 chain. The powder is placed in the wooden cup, A, either 

 dry or made up into a pyramidal form with a little water. 

 The brass ball, b, is brought immediately over it; the chains, 

 c d, being connected with the outer and inner surfaces of a 

 Ley den jar. The discharge takes place, and the powder is 

 inflamed. Price, $3.50. 



