1894. | NEW YORK ACADEMY OF SCIENCES. 147 
Fig. 1 shows a common combination, which has, in addition 
to the faces mentioned in the previous form, the orthodome [5], 
3-1 [305], the unit prism[{m], I [110], the orthoprism[z], i-3 
CS 
Se EY SPS ES 
Fig. 
[320] These three faces, so far as I have been able to find out 
have not been recorded from New York State. 
Fig. 2 shows an elongated form which somewhat resembles 
the Pitcairn pyroxene crystals inshape. The faces present are 
the basal pinacoid (c), OP [001], the positive orthopinacoid (2); 
7) 
Fig. 
1-i [101], the negative orthopinacoid (v),—1-i [101], the ortho- 
prism[z], i-} [320], and the clinodome [g],1-i [011]. The latter 
face is also a new one for this State. 
The following is a list of the angles measured and calculated : 
Faces. Angles measured. Angles calculated.* 
001 :100 84° 30’ 842-304 
100 101 43° 56’ 44° Q7 
100: 101 AoC 502). 25/ 
001: 305 28° .30/ D0 e oe 
001:101 41230! £02 3" 
320 : 320 T0° 00 GOS naa! 
110:110 92° 00 92°" 49’ 
The writer wishes to express his thanks to Prof. A. J. Moses, 
who kindly loaned him the specimens for examination, and gave 
him other aid. 
MINERALOGICAL LABORATORY, COLUMBIA COLLEGE, Feb., 1894, 
*E.S. Dana, System of Mineralogy, 1893. Wollastonite, p. 371. 
