466 
MEASUREMENTS OF CRYSTALS 
STRONTIANITE. (Continued.) 
P on a . 120° O' 
o on o ... 160 0 
a on a . 120 0 
CALCAREOUS SPAR. Figs. 55 to 100 inclusive. 
Page 215. 
Fig. 55. The primary, a rhombohedron. 
Figs. 56 and 57, secondary forms show¬ 
ing the reduction by cleavage to the 
primary. 
CALCAREOUS SPAR. 
P on P . 105°5' and 74 0 55' 0" 
P on r . 151 3 0 
c one . 120 0 0 
c on g . 116 33 55 
g on g . 134 26 0 
r onr . 144 20 26 
r onf. 104 28 40 
r on r" . 133 26 0 
