Bulletin, Denison University. Vol. XII, Art. XI. 



PLATE XIV. 



Fk;. 3. — View showing partially spotted and partially streaked rock, with tend- 

 ency toward arborescent form manifested near the middle of the picture. Surface 

 broken at an angle intermediate between that of Figs, i and 2, Plate XIII. Photo- 

 graphed from hand specimen. (One-half natural size.) 





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Fit;. 4. -View showing weathered surface of the rock. Partial leaching of the 

 dark spots is emphasized in the upper portion of the picture. Photographed from 

 hand specimen. (One-half natural size.) 



