484 GEOLOGY AND MINERALOGY. 
would render the collection a medium of reference of the highest interest, 
Especially should samples of all varieties from different localities be placed side 
by side for comparison, independent of the special colonial collection of objects 
of which they would form a part. 
We have confined our observations here to the coal deposits of our southern 
colonies, but will direct attention hereafter to those important coal fields we 
possess in the western world. 
NOTES ON CANADIAN CHLORITOID.—BY T. STERRY HUNT, F.R.S. 
(From the American Journal of Science and Arts, May, 1861.) 
“ Among the crystalline Paleozoic schists of the Notre Dame Mts., which are 
the Canadian prolongation of the Green Mts., of Vermont, is a rock characterized 
by the presence of a mineral which has been designated in the Reports of the 
Survey by the name ofphyllite, from the supposition ofits identity with a similar 
mineral from Massachusetts, described, named and analyzed by Thompson. The 
mineral in question is abundant in a fine grained grayish wrinkled micaceous 
schist from Brome, and in larger specimens from Leeds ; where it occurs in & 
Similar rock which is pearl gray in colour, passing into greenish gray, and con- 
tains a large proportion of quartz with a mineral talcose in aspect, but alumin- 
Ous in composition, and apparently micaceous. Similar micaceous schists con- 
taining the mineral in question may be traced in the continuation of the Notre 
Dame Mts., as far as Gaspé. In the rock of Leeds the phyllite occurs in small 
lamellar masses rarely more than one-fourth of an inch broad and one-eighth of 
an inch thick. In some specimens it forms spherical aggregations half an inch 
or more in diameter composed of radiating lamellae and sometimes making up 
one-half ‘the volume of the rock. In most localities however the masses are 
smaller and less abundant. The mineral has a perfect cleavage in one direction 
and two less distinct transverse cleavages, ‘ the lamelle are often curved and are 
not easily separable. Hardness 6:0, density 3-513, colour dark greenish-gray 
to black; brilliant black on the surfaces of perfect cleavage, which have a 
vitreous lustre; the cross-fracture is granular and exhibits a feeble waxy lustre. 
The streak and powder are greenish gray. The mineral resembles somewhat & 
dark coloured variety of hypersthene.’ The analysis of a carefully selected 
specimen from Leeds gave as follows :* 
Sili¢a.. . e645 Rode cge ob Hae cit sGonposdub sae alaeleleinik +++ 26°30 
PATONG jo)4 166 fee sagnoods Jens in 'shabape tani ios eiimeje Sie abebeh GHEE 
Protoxyd of iron....... aogneracoes SODAO IR sietpid elo ielsle os BADIOM 
Protoxyd of manganese.....+++++seeees she(storafofeleke dsistdiiea anes 
Ma@enesian cc cee cecil s ess hotels ietsfope/aceteseet ate siiels ocean eee a'66 
Water ..... sleblaveleiel't Sits Moscopsade ad minisisiolelale siclelelemieeies Hem Ogee 
100°01 
This analysis shows the mineral to be chloritoid, with which its specific 
* Report of Geol. Survey of Canada, 1858, p. 194. 
