NO. 1148. TOI'AZ CR YSTA A.S / .V 77/ A" .V. / TloXA L M USE UM—EA KLE. 



369 



CHATHAM, iNKW IIAMrsilIlx'K. 



Two good crystals from Bald Face Mountain, near Stoneliani, Maine, 

 are shown in the collection. They are about 2 cm. in width and per- 

 fectly colorless, with bright faces. In liabit 

 and conibinatious they are similar to the 

 Pikes Peak crystals. The base is not pres- 

 ent on either of tlu^ crystals, and .V there 

 fore meets in a long' edge. 



Fig'. 22 shows the type of crystal. The 

 three brachydomcs A",/, and ij are all well 

 developed. The edge nX is replaced by a 

 plane which is so rounded as to be indeter 

 minate, but from its |)ositiou corresponds 

 to the h)i'm -/ )(}.]().!> | occurring on the 

 Pikes Peak crystal. (No. 82579, II.S.N.M.) 



In conclusion, the writer wishes to ex- 

 l)re8S his acknowledgments to Mr. Wirt 



Tassin, the assistant curator in the departnu^nt of mineials, foi- his 

 kindness in i)ermitting the free use ol" material and instruments for 

 this study. 



Proc. N. M. vol. .Kxi 21 



V\v..-1 



l-'AC 



'I'oI'A/, CIIVSIAI. I'UOM liAI.K 



Mountain, N'kw Hami-siiihk. 



