214 BERTHA VAN H. ANTHONY AND C. V. EKROTH 



Since the boiling had caused the faint pink color to disappear, 

 the hot mixture was then promptly titrated again, the same 

 end point being approximated^ as closely as possible, and the 

 figures recorded. The room temperature figure plus that ob- 

 tained after boihng one minute gave a total which represents 

 the boiling titration figure as recorded in the charts. 



In the first lot of veal, (series B 30, B 60, B 120), the correc- 

 tions were made to plus one at the room temperature figures. 

 A second lot of veal infusions (B2 30, B2 60, B2 120) were pre- 

 pared in the same manner as above. The corrections in this 

 lot were made to plus one at the boihng figures. 



DESCRIPTION OF CHARTS 



In charts 1 and 2 are shown the uncorrected portions of meat 

 infusions titrated after successive heatings in the autoclave 

 and plotted according to both the room temperature and the 

 boihng temperature figures. It will be seen that in each lot 

 of meat the room temperature titrations fall into one group and 

 the boiling titrations into another; also that the boiling figures 

 are the higher. 



Chart 3 is a sample^ chart showing not only the uncorrected 

 portion of B 120 as given in Chart 1, but also the corrected por- 

 tion, B 120 C. This portion was corrected to plus one (+1) 

 according to the room temperature titration figures and read- 

 justed to plus one after each autoclaving, as shown by the a 

 line. The a line shows the figures of this same material when 

 boiled one minute in the casserole and titrated hot. This line 

 is hypothetical and shows only the amount of soda that would 

 have been needed had the boiling figures been used for adjust- 

 ment to plus one. 



The Q line shows the total amount of acidity produced in 

 the corrected portion even after the addition of soda, accord- 

 ing to the room temperature figures. 



^ The difficulty of catching the first color change of phenolphthalein in hot 

 solutions will be discussed under "Indicators." 



* This chart is typical also of the B 30 and B 60 sets. 



