78 JOURNAL OF THE 
in their development and their outline could readily be de- 
tected. Some of the crystals measured 2°™ in the direc- 
tion of the d, axis. 
Associated with the brouzite is the emerald-green di- 
opside mentioned by Williams, which is sparingle scat- 
tered through the rock in very small, clear, green grains. 
While the websterite is composed of a base of diopside 
grains with the rather large rounded crystals of the 
bronzite penetrating through it, the bronzite rock is es- 
sentially interlocking prismatic crystals of the bronzite 
with a few grains of the diopside disseminated through 
it. This rock, also, does not show any of the granular 
character of the websterite; but on the contrary it is very 
compact and tough. 
The material for analysis was hand picked and that se- 
lected showed no impurities or decomposition when exam- 
ined with the magnifying glass. 
The results of the analysis by Dr. Baskerville are giv- 
en below: 
Ratio 
SiO; seorskiue “1/1 uS3"68 “894. ae / 
MMOs. p08 ee ee 197 00% 
ir (Ohi aes ered “50 ‘OOS 4 
ROS OB SVE api eo 2 mes 8 125 | 
TG RE eres ee EOE fee $e ‘O51 > “Oe comet ee 
Mie Ce rag) aes "838 | 
| SB RRR ES 
99°62 
In the above analysis the ratio of the bivalent oxides to 
silicia is close to 1:1, and of ferrous oxide to magnesia 
and lime is very near to 1:7; this would give the formu- 
la (MeFe)SiO, with Mg: Fe=7:1. Assuming that the 
Al,O, and Cr.O, belong to spinel and deducting RO suf- 
ficient tocombine with them, the analysis, after substitu- 
ting for CaO its equivalent of MgO and recalculating to 
