The Crystallography of Anatase Crystals. 
303 
suspicion that anatase may not after all have the tetragonal holohedral 
symmetry of Class 15 hitherto assigned to it.* 
An extended examination of a larger number of crystals is in progress 
with a view to confirming or disproving this suggestion. 
The foregoing work was carried out in the Mineralogical Department 
of the South African College, Cape Town, under the general supervision 
of Dr. Andrew Young. 
* Tutton, "Crystallography and Practical Crystal Measurement," p. 212. London, 
1911. 
