132 II. D. Newton — Volumetric Estimation of Titanium. 



These experiments show that it is possible to reduce titanic 

 acid by means of zinc in a small flask and to determine the 

 titanum with success, by reducing in an atmosphere of hydro- 

 gen, adding an excess of ferric sulphate, and titrating the 

 resulting, and equivalent, ferrous salt with potassium perman- 

 ganate. The factor for metallic iron divided by 0*689 gives 

 the factor for titanium dioxide. 



In conclusion, I wish to thank Prof. F. A. Gooch for advice 

 and assistance given during the progress of this work. 



