108 BENJ. PIKE'S, JR., DESCRIPTIVE CATALOGUE. 



arrangement adopted when a gas produced by the action 

 of the assay, with the gas from A, is to be transmitted intc 

 water, a solution of potassa, or any other substance con- 

 tained in the bottle Z. 



Fig. 580. 



Fig. 580 represents a still more complicated arrangement, 

 in which the product obtained, as in the preceding figure, 

 is subjected to still further operations, by the materials in- 

 troduced at S or T. A glass spirit-lamp, mounted on a 

 movable arm, and rod attached to a foot, as represented at 

 Z, is a convenient appendage. 



Price, $2.50 to $10.00. 



Fig 531. 



Fig. 581, one bulb tube. 



Price, 371-cts. 



Fig. 582 



Fig. 582, two bulb tubes. 



Price, 50 cts. 



