H. E. Merwin — Per oxidized Titanium Solutions. 123 



.0010 



.0020 



.0030 



.0040 



20 



40 



60 



80 



(00% 



.0010 



.0030 



.0050 





..■cv^^ 





30° 

 50° 

 70° 















\ 





3^\ 





\ 



H\ 









C 



v x> 



s G 



B 





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A. Coloration in peroxidized titanium solutions in presence of fluorine 

 and free sulphuric acid. The fluorine in grams is read on the ordinate. 

 The percentage ratios of depths of color in the standard solution to depths of 

 color in the test solutions are read on the abscissa. For given amounts of 

 fluorine and acid the ratio is found above the intersection of the lines repre- 

 senting the fluorine and acid. The curves are plotted for a temperature of 

 22" C. The line m migrates to d as the solution is heated to 32° C. 



B. The percentage of bleaching by fluorine may be found from these 

 curves in the same way that the coloration ratios were found from the 

 curves of A. 



C. Showing the rise in percentage of coloration due to heating. Curve e 

 for a solution containing l cc of sulphuric acid and '0014 g. of fluorine : f 

 for 3-5 cc of acid and '0037 g. of fluorine ; g for 3-5 cc of acid and -0019 g. of 

 fluorine ; h for a solution standard at 22° C. 



