BEOOKITE. 227 be 90° o' ca 90 0 ab 90 0 yy' t 31 20 xx’ 68 36 dd' 103 5 y tf / pb 124 8 12 12 9 b 8 20 kb 11 63 lb 22 49 mb 40 6 mm’ 80 10 oa 67 61 ob 50 47 oc 65 43 ra 62 27 rb 43 36 rc 71 11 za 67 37 zb 63 6 zo 36 15 ea 50° 31' ve 32° 46' eb 67 48 ia 46 1 ec 47 41 ib 61 47 ua 49 24 ic 68 26 ub 47 25 ua 49 24 uc 69 62 ub 47 25 na 38 31 uc 69 61 nb 62 18 ha 17 39 nc 65 32 hb 76 65 f a 22 31 he 78 22 f b 70 46 wa . . 24 27 fc 78 43 wb 72 0 sa 64 15 we 74 1 sb 39 15 8a 54 67 so 62 37 6b 75 64 va 74 39 6c 38 35 vb 61 60 FIG. 240. FIG. 239. FIG. 241. o'! FIG. 242. 6 Combinations, bdme8, bdmezv, abxdmezv, bcmet..x.z.v, abcxy- tdmlevdoni, abmxytezo.sf.cnrl, tngxyoe.n, camgze, abcydme, bcxyt- m f”f The faces b usually striated parallel to their intersections with m ; g striated parallel to their intersections with m; 0 uneven. Cleavage, a. Fracture uneven. Translucent... l 6