488 
MEASUREMENTS OF CRYSTALS, 
PYROXENE. (Continued.) 
Figs. 218 and 219. Twins from Putnam 
county. 
Fig. 220, et seq. 
M on o _._ 145° 9 / 
M on x __ 134 17 
l on a: __114 26 
r on t _ 106 6 
r on x ..._.... 126 36 
x on a? ... _... 131 8 
u on w .. 131 8 
PIORNBLENDE. Fig. 223 (Ms) to 250 inclusive. 
Page 298. 
Fig. 223 (bis). The primary, an oblique 
rhombic prism. 
HORNBLENDE. 
M on 1VP ......._ 124°30 / 
M or M' on P . 103 1 
Fig. 224, et seq. 
M on s ...... 152°17 / 
ftp on a; .. 117 43 
k on k * ____ 155 4 
Jc on at ____ 102 22 
l on l ........__ 110 2 
l on* ............ 105 11 
i on at ........_129 8 
r on r __... 149 38 
r on a? __...._ 105 11 
Incorrectly 55° 4 / on page 301. 
