JOURNAL 



OF THE 



WASHINGTON ACADEMY OF SCIENCES 



Vol. II, MARCH 19, 1912 No. 6 



MINERALOGY. — The crystallography of variscite. Waldemar 

 T. Schaller, Geological Survey. 



In a recent publication 1 1 gave a description of variscite crys- 

 tals from Utah. All of the material then available showed the 

 same crystal habit, a rectangular, tabular one which was illus- 

 trated by crystal drawings and by a photograph. Thru the kind- 

 ness of Messrs. Edison and Bird, of Lucin, Utah, I have recently 

 examined a larger number of specimens and found that the mineral 

 crystallizes in several additional habits, such as very thin plates, 

 long prisms and octahedral pyramidal crystals of which the unit 

 pyramid {ill} is the dominant form. Beautiful little twin 

 crystals were also found in a measurable condition. 



The number of crystal forms has been extended from the four 

 given in the paper above cited to over fifteen. A full description 

 of these crystals with their angular measurements is to be given 

 in a paper nearly ready for publication. 



MINERALOGY.— New manganese phosphates from the gem 

 tourmaline field of Southern California. Waldemar T. 

 Schaller, Geological Survey. To be published in a Geolo- 

 logical Survey Professional Paper, entitled : ' ' The Gem Tour- 

 maline Field of Southern California." 



The various properties of these new minerals and their relation 

 to each other will be fully described in the report referred to above. 



1 Schaller, Waldemar T.: Crystallized Variscite from Utah. Proc. U. S. 

 National Museum, 41 : 413-430, plate. 1912. 



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