S6 The American Geologixt. Auguj^t, issa 
ticular cases cited hero being of two limoiiile ores from Spring- 
ville, Pictou county. 
Iron sesquioxide 10.848 48.223 
Manganese oxide ()2.'J5U 
" peroxide 14.410 
Magnesium 1.630 
Lime 7.280 0.015 
Alumina 2.^80 Trace 
Baryta 0.670 
Sulphur 0.480 
Phosphorus 0.020 ■ 
Insoluble residue 2.731 25.130 
Water of composition / lo^i'^n 
Moisture 1.450 \ ^^'^'^^ 
90.439 100.808 
On Cape Breton island as well as on the main land of the 
province are found deposits of manganese, some of which attain 
considerable dimensions. Among the more important of these 
may be mentioned those situated near Loch Lomond, and of 
which Mr. Hugh Fletcher reports as follows: Geological Survey 
report, 1882-84: 
"Large deposits of pyrolusite, which promise to be of great 
importance, have recently been discovered and developed liy the 
Hon. E. T. Moseley, of Sydney, on the south side and near the 
head of Loch Lomond, in Cape Breton county. The ore is asso- 
ciated with lower Carboniferous rocks and has been worked in 
two places about three-quarters of a mile apart. At the most 
easterly of these, in a Ijrook on tlie farm of Norman Morrison, a 
tunnel has been driven about tliirty feet on a vein al)0ut seven 
inches thick, dipping N. 87° W. < 25° in fine red sandstone 
overlying reddish and greenish grit, with grains of quartz aliout 
the size of wheat and red marly sandstone. The ore is irregu- 
larly mixed witli red and grey bituminous limestone, red and 
greenish shale conglomerate and other rocks lilotched with calc- 
spar. It is in lenticular layers and also intimately mixed with 
the limestone, being probaljly of the same nature and origin as 
the hematite and forming at times a cement for the pebbles of the 
conglomerate * * * The mines were first worked in 1880. 
In 1881 about 70 tons, and in the following year 5!) tons of ex- 
cellent ore were shipped to the LTnited States, * * * Xx\ 
analysis of a sample from the Morrison mine afforded Mr. Adams 
!»1.84 per cent, of manganese dioxide, only .12 per cent, of fer- 
ric oxide and 2.91 per cent, of insoluble residue." 
