RICHARDS AND STULL. — BROMINE AND OXALIC ACID. 



329 



SERIES V. 

 Containing 0.0G75 Gram of HBr. 



SERIES VI. 

 Containing 0.148 Gram of HBr. 



The results given in these tables are plotted in Figure 2, the bromine 

 present at any time being drawn as ordinate, and the time as abscissa. 



In these experiments the amount of oxalic acid (about 2.5 per cent) 

 by weight was so chosen that tiie concentration of the reacting oxalic 

 mc^lecular species remained essentially constant during the reaction. In 



