Ills 
DISTBIBUTION IN FOREIGN COUNTRIES. 151 
CANADA. 
The Canadian corundum deposits, which have been attractine: con- 
siderable attention, are in the Province of Ontario. Tlie corundum 
occurs as a ])riniary constituent of syenite, pegmatite-syenite, and also 
of nepheline-syenite, and those rocks have been traced for over 50 
ndles across Renfrew, Hastings, and Haliburton counties, with smaller 
})elts of the same rocks in Peterboro, Lanark, and P^rontenac dis- 
tricts to the south, making a total distance of nearly 100 miles in 
which these rocks have been found. 
The rock ■ varies from a normal syenite to a nepheline-syenite, a 
mica-syenite, and a pegmatite-syenite. Corundum has been found in 
all four of these rocks, but it is more abundant in the normal syenite, 
which might well be classified as a corundum-syenite. These rocks, 
wdiich occur as dikes cutting through the gneisses, are sometimes in 
large masses that appear to grade into granite. The dikes vary greatly 
in width, being usually a number of feet wide; a few have been 
observed, however, that were only a few. inches wide and these were 
thickly studded with corundum crystals. Analyses of this rock from 
various parts of the occurrence show^ it to contain from 5 to 15 per 
cent of coriuidum. 
The principal operator of these corundum deposits is the Canada 
Corundum Company (Limited) , which owns deposits in the townships 
of Raglan, Radcliffe, Brudenell, Carlow, Monteagle, and Dungannon. 
This company's principal works are located at Craigmont, in the 
extreme northwestern part of Raglan Township, RenfrcAV County, 
about 8 miles southwest of Combermere, Avhere a corundum mill, 
having a capacity of 15 tons of cleaned corundum a day, has been 
erected. The percentage of corundum in the commercial product is 
higher than in any corundum that has been put on the market for 
many years. When this corundum was first discovered in the normal 
syenite, the corundum on the surface showed a superficial alteration, 
which partially or wholly destroyed its abrasive value. Ah mining 
was carried deeper, however, this alteration was found to grow less 
and finally to disappear,"So that the more recent tests of the com- 
mercial corundum from this mine show that it is giving very good 
satisfaction as an abrasive, and a very pure commercial corundum 
product is obtained. One of the chief difficulties encountered in 
cleaning this corundum w^as the elimination of the feldspar, but this 
difficulty has finally been overcome. 
There are two other companies operating corundum deposits in this 
district. One, the Ontario Corundum Company, whose mine is situ- 
ated at New Carlow, about 12 miles from Craigmont, has also erected 
a mill having a capacity of 4 tons of cleaned corundum per day. The 
