INDEX SLIP. 
TuTTON, A. E.—A Comparative Crystallographical Study of the Double 
Selenates of the Series R.iM(Se0^)2,6H20.—Salts in which M is 
Magnesium. Phil. Trans., A, vol. 197, 1901, pp. 255-284. 
Selenates (Double) cf Series R 2 M(Se 04 ) 2 , 6 Il 20 —Crystallographical Study 
of—Magnesium Salts. 
Tutton, a. E. 
Phil. Trans., A, vol. 197, 1901, pp. 255-284. 
