EXPERIMENT STATION BULLETINS. 



)r,7 



Fig. 4. Measuring-compensating burette, used in obtaining the.volume-equivalent of gases at 0° C. 

 and 760 m. m. mercury pressure. "M"= measuring burette. "C" = compensating burette. "P" 

 = Hempel gas pipette. "B" = mercury aspirating bottle. 



