474 



MEASUREMENTS OF CRYSTALS. 



APATITE. (Continued.) 



Fig. 109. 



M one 150° 



Figs. 1 10 and 111, represent the rounded 

 terminations and bent prisms found at 

 Hammond, St. Lawrence county. 

 Fig. 112. A compound crystal from the 



preceding locahty. 

 Fig. 113. 



M ona; ..„ 129°13'53" 



P on.r 140 46 7 



FLUOR SPAR. Figs. Ill to 118 inclusive. Page 

 243. 



Fig. 115. The primary, a regular octa- 

 hedron. 

 PonP' 109O28'16" 



Fig. 114, shows the manner in which the 

 cubes of flour spar cleave into octa- 

 hedrons and tetrahedrons. 



FLUOR SPAR. 



Fig. 117. The octahedron with the solid 

 angles replaced. 

 Poni 125°15'52" 



DATHOLITE. Figs. 119 and 130. Page 346. 



Fig. 119. The primary, aright rhombic 

 prism. 

 MonM' 103=40' 



PHARMACOLITE. Figs. 131 and 133. Page 347. 



Fig. 121. The primary, a right oblique 



angled prism. 

 Fig. 122. 



/on/ 117024' 



P * to the edge between 



/ and/ 83^14' 



n on n 141 8 



* Incorrectly o at page 257. 



