1904.] Properties of Solutions of Chloroform in Water, etc.. 393 



which measured 8 cm. in diameter above, bulged out as shown to- 9 cm.,. 

 and then narrowed below to 6 cm. 



The wider top and bulge were found very useful in facilitating the 

 introduction and vigorous movements of the bar electro-magnet used as, 



a stirrer in connection with the iron stud (seen in figs. 1 and 2, at the 

 top of the mercury), which was dropped into each tube, and, during an 

 experiment, agitated up and down so as to thoroughly mix the fluid 

 under experiment, and so bring it into equilibrium more rapidly with 

 the vapour in the space above it. 



