THE ANALYSES. 



21 



TABLE 8 Continued. 



1 The volume of carbon dioxide being much greater in the case of the granules than in the finely reduced 

 powder strongly suggests that much of this gas is mechanically inclosed in cavities within the quartzite, and 

 escapes when the granules are pulverized. This opinion was strengthened by a slight cracking noise which 

 came from within the tube as soon as heat was applied. The gas came off with a rush when the tube was heated. 



2 No. 106. Chemical analysis by Dr. H. N. Stokes : Metallic part, .'3.06 per cent., as follows : Fe, 21.09; Cu, .01 ; 

 Ni, 1.81 ; Co, .15. Stony part, 76.94 per cent., as follows : SiOn, 34.95 ; TiO, .08 ; P.,O 6 , .27 ; A1.)O 3 , 2.55 ; CrO 3 , .53 ; FeO, 

 8.47; FeS, 5.05; MnO, .18; CaO, 1.73; MgO, 21.99; K 2 O, .23;"Na. 2 O, .66; H 2 OatllO, .06; above 110, .19"; 100.00. 



