NOTES ON MANGANESE ORES OF LOCH LOMOND.—GILPIN. 99 
sometimes forming the cementing material. This iatter mode 
of occurrence is similar to that shown by the red hematites found 
in the lower carboniferous conglomerates at several parts of the 
island near their junction with older strata. And near the Loch 
Lomond post office a highly manganiferous red hematite occurs 
under conditions apparently of a similar nature. 
The limestone overlying these measures is highly manganifer- 
ous and ferriferous, and contains numerous crystals of galena, 
which some time ago incited prospecting, as they were thought 
to be silver ore. 
The ore from the Western, or McCuish mine, is a fine-grained 
pyrolusite, sometimes holding a little brown, or hard ore. It is 
generally amorphous, but the better grades show a subcrygtalline 
structure. The McCuish ore is a soft black amorphous ore, 
apparently of high order. At, several points considerable masses 
of lenticular hard ore are met, with calespar and heavy spar. 
The minerals associated with the ore are calcite, baryte and 
limonite. 
The following analyses by Mr. G. C. Hoffman, Analyst to the 
Geological Survey, will show the character of the ores :— 
Sample No. 1.—Pyrolusite with a little manganite, gave— 
IBIGRCL Or spo arts st Stayed che atche Seale 81:52 per cent. 
Sample No. 2, consisting almost exclusively of pyrolusite, gave 
BIHORADOS! 1s Nsites ces hk ales 3 88°98 per cent. 
GREG OXIMe Wey 6s Gy\c aie lea <3 2 sad LDN Sa os 
Ores represented by the above analyses would be adapted for all 
uses to which the mineral is usually put, and especially to glass 
making. 
As the extent of manganiferous ground is considerable, and 
the quality good, it is to be hoped that these ores will form a 
permanent addition to the list of Cape Breton exports. Up to 
the close of the year 1883 about 200 tons have been shipped. 
These ores have been worked by Mr. E. T. Moseley, who 
deserves credit for having inaugurated a new mining industry 
in Cape Breton County. 
