278 



H. S. SvA 



TABLE XI. 

 IV. V. 



Sp. Gr. 



2.935 2.901 2.995 2.995 2.854 2. 



2.870 2.786 2.760 2.787 



Sp. Gr. 



2.828 2.722 2.590 2.621 



2.504 2.596 2.646 2.559- 



