498 
MEASUREMENTS OF CRYSTALS, 
»> 
FELDSPAR. (Continued.) 
Figs. 307 and 308. 
M on s . 116°20 
M on y . 90 0 
P on Z . Ill 40 
P on s . 124 10 
P on y. 99 29 
Fig. 309. A compound crystal from New- 
York. 
Fig. 311. 
Monte..._ _ 90° O'• 
P on a? . 128 51 
FELDSPAR. 
Fig. 312. A twin from Orange county. 
Fig. 315 and 316. 
M on n . 
... 135° 0 
M on«j .. 
... 90 0 
M on « . 
... 150 0 
T onz v .. 
... 150 0 
q on a? . 
... 164 40 
Figs. 318 and 319. Twins from Ham¬ 
mond, St. Lawrence county. 
