ExXDLicH.1 BIBLIOGRAPHY OP COLORADO MINERALS. 159 



Proceedings Academy of Natural Sciences of Philadelphia. 1875. 

 Part II, p. 363. "On the occurrence of uranium, silver, iron, 

 &c., in the Tertiary formation of Colorado Territory." By E. L. 

 Berthoud. 



1876. — Annual Eeport Explorations and Surveys west lOOth Meridian. 

 1876. Appendix J J, p. 186. "List of Minerals." By Dr. Oscar 

 Loew. 



Proceedings Academy of Natural Sciences of Philadelphia. 1876. 

 Part II, p. 155. " Mineralogical Notes." By Dr. G. A. Koenig. 



Ml), cit. 1876. Part III, p. 333. "Pickeringite from Colorado." 

 By E. Goldsmith. 



Proc. American Philosophical Society of Philadelphia. 1876. 

 See 1874. 



1877. — Proceedings Academy of Natural Sciences of Philadelphia. 1877. 

 Part I, p. 9. " On Astrophyllite, Arfvedsonite, and Zircon." 

 By Dr. G. A. Koenig. 



Zeitschrift fiir Krystallographie und Mineralogie. P. Groth. 

 Leipzig. Vol. ii, No. 1. " Ueber einige Tellur und Vandmin- 

 eralien." By F. A. Genth. 



