110 C. E. Lineharger — Apparatus for the Rapid 



bly and seemed to be capable of a considerable degree of accu- 

 racy. The apparatus described below is a modification of the 

 one employed by Jager. 



Il 



11. Description of Apparatus. 



The apparatus 

 (fig. 1) consists of 

 the following pieces : 

 — a column of brass 

 tubing AA with 

 iron tripod base; a 

 short horizontal arm 

 B, to which is at- 

 tached a brass gibbed 

 plate SS supporting 

 the capillary tubes 

 by means of the 

 clamps CC and DD, 

 and also the microm- 

 eter screw EF ; a re- 

 tort ring AH bear- 

 ing the beaker II; 

 a compression de- 

 vice consisting of a 

 screw L pressing into 

 a rubber ball K, 

 which is connected 

 by means of rubber 

 tubing and a glass Y- 

 tube ]^ to the upper 

 extremities of the 

 capillary tubes; a 

 vertical rod MM 

 passing through the 

 arm B (to which it 

 may be clamped by 

 a thumb-screw not 

 shown in the figure) 

 and provided with 

 rings to support the 

 rubber tubes con- 

 nected with the cap- 

 illary tubes, the lat- 

 ter being thus relieved of the weight of the former ; a test- 

 tube O, into which the capillary tubes pass, supported by the 

 cover of the beaker II ; two thermometers, one to take the 



