472 



MEASUREMENTS OF CRYSTALS. 



CALCAREOUS SPAR. (Contiimed) 



P 011^ 143° 0' 



(The other measurements will be found 

 on the preceding pages.) 



Figs. 97 and 98. Compound crystals from 

 Rossie, St. Lawrence county. 



Fig. 99. A crystal with a smaller one im- 

 planted. Rossie, St. Lawrence. 



Fig. 100. A very acute rhombohedron. 



ARRAGONITE. Fig. 101. Page 235. 



The primary, a right rhombic prism. 



M on M' 116= 5' 



M or M' onP 90 



GYPSUM. 



Figs. 102 to 10-1 inclusive. Page 237. 



Fig. 102. The primary, a right oblique 

 angled prism. 



M onT 113° 8' 



P on M or T 90 



GYPSUM. 



Fig. 103. 



P on/ 124H1'43" 



P on Z 108 3 19 



/ on/ 110 36 34 



I on I 143 53 22 



ANHYDRITE. Fig. 105. Page 238. 



The primary, a right rectangular prism. 



M on T 90° 0' 



P on M or T 90 



APATITE. Figs. 106 to 113 inclusive. Page 239. 



Fig. 106. The primary, a regular six- 

 sided prism. 



M onM 120° 0' 0" 



M on s 135 



M ona; 129 13 53 



a: on a: 143 7 48 



