824 



sented scliematically in fig. 6). At its bottom the vessel A passes 

 into a tube B, which is in connection by means of a side tube with 

 a GAEDE-airpump and other auxiliary apparatus to be used in the 

 fdling. The tube B passes through the bottom of the thermostat, 

 and is connected with a large pear-shaped mercury bulb by means 

 of a rubber tube. 



Fig. 6. 



