BROMINE IN SEA WATER. 



8T 



directly to the flask, find that the third drop will turn red, 

 and read 16.9 cc. off the burette. 



The following table will show how the observations may 

 be conveniently noted, -j- and — signifying respectively 

 blue and red : 



For the analysis of bromine I modify my apparatus as 

 follows: The flask holds about 70 cc. and has a round bot- 

 tom, if possible, egg-shape, and short and wide neck, so that 

 a cork with three borings may be fitted. One of these holes 

 serves for a small bent glass tube, with rubber tube and clamp 

 attachment as described above. Instead of one funnel I have 

 two, as much as possible of equal size and of similar shape 

 as described, each holding 10 or 15 cc Into one of the 

 two cups I place a short and thin glass-rod, bent so that the 

 heaviest part is inside the cup, and graduate (with the little 

 glass-stirrer inside) for one and for five cubic centimeter. 

 The tube of the other funnel is bent above the cork, so that 



