574 



Transactions. 



Apparatus. 



After the breaking of the first apparatus, which was composed partly 

 of glass, the apparatus used throughout the work was that shown in fig. 1, 

 half in view and half in section. It consists of a heavy copper tube, fitted 

 with a heavy cap, through which passes a copper capillary tube. The 



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Union 



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£qu*r* cap-nut 



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JJratvn cotyer tube 



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Fig. 1. 



latter is connected to a bomb of liquid carbon dioxide, and a pressure-gauge 

 registering up to 40 atmospheres. The apparatus is shaken by carrying 

 the bottom round in a horizontal pulley run by an electro-motor. The 

 tube bears at the side a small needle valve, through which the solution 

 can be run off. 



