EXPERIMENT STATION REPORTS. 



257 



TABLE 4.— TITRATION OF BROTHS BY THREE METHODS. 



No. of cc. N /20 NaOH required to neutralize 5 cc. of media. 



Note— The— sign before a reading indicates that the mixture was alkaline in which case it was t'trated with N/10 acid potassium 

 phthalate. 



33 



