EXPERIMENT STATION BULLETINS. 



391 



S JO /S^ 20 Z5 30 

 C C' drr? mOfiicL 



TABLE V. 



Accuracy of Method. 



In order to test the accuracy with which results may be duplicated 

 by different operators, a stock solution of acid ammonium citrate was 

 made up and analyzed independently by four laboratoi^ assistants, three 

 of whom had never before made any conductivity measurements. One 

 hundred cubic centimeter portions of the acid citrate solution were trans- 

 ferred to 250 c.c. volumetric flasks, the designated amounts of ammonium 



