must be regarded as representing accurately the composition of the 

 substance, especially since they correspond so closely to the formula 

 suggested by Brogger as the result of Bickstrotna investigation. The 

 tsehetl'kinite was somewhat altered. In thin section Mr. Cross found 

 a brownish transparent amorphous substance crossed by cracks con- 

 taining reddish brown ochreous decomposition products and bands of 

 colorless minerals that appear to be calcite and sphene, besides several 

 darker minerals. The material analyzed by Price 13 was found upon 

 examination to be as complex in composition, so that it seems probable 



that the substance has no place among minerals. The buuacife, 



tcenite and plessite found in the Welland meteorite 14 were so easily 

 separable that Davidson 1 '' has succeeded in obtaining a sufficient quan- 

 tity of each for analyses. The kamacite is brittle and of the color of 

 cast iron, while tamite is silverv in lustre and is flexible. The results 



