Eakle.] 



Colemanite from Southern California. 



47 















4> 



v — 









Prisms = tg 



PP 





Sym- 

 bols 



P 'I 



Refleetio 



g 



o 



V 





h 







P 



h - 



ho 



lg sin 

 Ik tan p 

 lg cos (j> 



lg x' 

 lg v' 



x' 

 .'/' 



= x' — e' 

 (positive) 

 = x' + e' 

 [negative) 



</</., 



g- 



§ 



173°43 



91 c 



05 



33°59 



33° 



11 



9.747374 

 9.815555 

 9.918659 



9.562929 

 9.734214 



0.3656 

 0.5423 



0.0007 



0.5423 



1) 1 



g- 





285 



44 



91 



06 



34 



00 



33 



12 



9.747562 

 9.815831 

 9.918574 



9.563393 

 9.734405 



0.3659 

 0.5425 



0.0004 



0.5425 



1 



g- 







301 



03 



106 



46 



18 



41 



48 



52 



9.505608 

 0.058790 

 9.976489 



9.564404 

 0.035285 



0.3668 

 1.0846 



0.0005 



1.0846 



2 



P- 



J 



285 



47 



1 « V 



ov 



33 



57 





05 



9.746999 

 0.294397 

 9.918830 



(1.041396 

 0.213227 



1.1000 

 1 .6339 



0.7337 



1 .6339 





g- 



V 



120 



28 



106 



50 



19 



16 



48 



56 



9.518468 

 0.059817 

 9.974969 



9.578285 

 0.034786 



0.3787 

 1.0834 



0.7450 



1.0834 



— 1 2 



g- 



w 



104 47 



91 



21 



34 



57 



33 



27 



9.758050 

 9.819959 

 9.913630 



9.578009 

 9.733589 



0.3785 

 0.5415 



0.7448 



0.5415 



— 1 1 



g- 



71 



49 



45 



78 



39 



90 



01 





45 



ft 



9.578486 



oo 



9.578486 



00 



0.3789 

 



0.7452 



o 





g- 



w' 



354 



41 



91 



24 



34 



57 



33 



30 



9.758050 

 9.820783 

 9.913630 



9.578833 

 9.734413 



0.3792 

 0.5425 



0.7455 



0.5425 



— 1 1 



g- 



V 



339 



00 



106 



53 



19 



16 



48 



59 



9.518468 

 0.060582 

 9.974969 



9.579050 

 0.035551 



0.3794 

 1.0853 



0.7457 



1.0853 



— 1 2 



g- 



(I 



49 



45 



106 14 



90 



01 



48 



20 







0.050647 



00 



0.050647 



oo 



1.1237 

 



1.4900 







-2 



g- 



k 



23 



58 



109 



14 



64 



14 



51 



20 



9.954518 

 0.096803 

 9.638197 



0.051321 

 9.735000 



1.1254 

 0.5433 



1.4917 



0.5433 



—2 1 



g- 



u 



5 



44 



115 



18 



46 



00 



57 



24 



9.856934 

 0.194141 

 9.841771 



0.051075 

 0.035912 



1 . 1 247 

 1.0862 



1.4910 



1.0862 



2 2 



g- 



Jc' 



75 



30 



109 



11 



64 



14 



51 



17 



9.954518 

 0.096027 

 9.638197 



0.050545 

 9.734224 



1.1234 

 0.5423 



1 



1.4897 



0.5423 



—2 1 



