Z27 128 ZZ3 £.30 ^J/ 2JZ ZO:-. 



Z.76 ZJ6 e/S ZJSO ZBl ^SZ Z33 iM- ZBS A3S S£7 ZBO 269 eSO 231 2S2 293 2S4 

 142. '43 Iff Iff 'f /Y\'f<'^' '^2 '^ 1^ 1.^ 196 197 /Jj6 JA9 JQO ZJ)I ^■■?^ Zl>3 ZW tOS sot Z07 2.00 



ZLOL 



Tri iyi nif 



7 £75 



'S;-:^ 



^-^, 



M2 ih m 146 146 147 /4t; 



DIAGRAMMATIC TABLE 



REFRACTION -^ MINERALS 



CH/EF INDICES indicated by position oj vertical lines 

 BIREFRINGENCE indicated by length c^ trorizontoi 

 line^ . 

 BY WOHOTCHKISS 

 Madison Wis 



l-SZ 1.63 134 I.9S 136 1.97 1.38 1.99 ZOO £.01 2.02 2.03 294 2.0S 29b Z07 g.Od 



