186 



H. B. TAYLOR. 



4-5 



d 4-4 

 o 



w 



4.3 



4-2 



10 



10' 



Fiff. 2. 



125 1-50 1*75 2-0 



-Concentration of Milk (Milk 36 hours old). 100% 



observed with that obtained by adding a few drops of one 

 of the standards (such as are given in Table VII) to the 

 same quantity of indicator and water. 



It appears at first not unlikely that milk and these 

 phosphate or citrate solutions might have the H ion 

 changed by dilution to very different extents; however, 

 this does not appear to be the case, as the result for the 

 H ion concentration obtained from the use of indicators 

 with diluted milk and diluted solutions are almost identical 

 with results obtained by E.M.F. measurements. In the 

 following table are given a few figures showing the agree- 

 ment between values for the H ion concentration of milk 

 obtained by both methods, 



