60 Scientific Proceedings, Royal Dublin Society. 



laboratory in the following way : — Take an ordinary funnel, and 

 cut off all but half an inch of the stem. Over this stretch a piece 

 of India-rubber tubing, so as to connect it with a piece of glass 

 tubing, to serve for a bottle. Another piece of tubing, or an India- 

 rubber cork on the end of a glass rod, to serve for a stopper, com- 

 pletes the apparatus. 



