AIR PUMPS AND APPARATUS. 

 Fig. 181. 



195 



pump is conveniently worked by a large double lever 

 handle ; the barrels of the pump are thirteen inches long, 

 two and a half inches internal diameter ; the whole with 

 the receiver standing about four feet from the floor. 



Price, with mahogany frame, $65.00. 

 " " rosewood " $70.00. 



Single Barrel Air Pump. (Fig. 182, next page.) This 

 pump consists of a tube, or barrel of brass with equal bore, 

 having a piston moving by means of a rod and handle ; the 

 barrel is attached to its base by a screw, which is firmly 

 clamped to the square mahogany table supporting the 

 whole ; in the centre of the table there is a receiver plate, 



