Asbestos, Its production and use: With some account of the asbestos mines of CanadaJones, Robert H.
Science
Asbestos, Its production and use: With some account of the asbestos mines of Canada
Jones, Robert H.
Asbestos; Asbestos mines and mining -- Québec (Province)
When I last visited Broughton, in the autumn of 1886, I went over the
ground in company with the late Mr. Fraser, who was then resident on the
property, but was unable, from the quantity of water in the cut, to
trace any of the big veins which had previously been worked. It was
evident, however, that in consequence of a sudden dip downwards
considerable expense would have to be incurred, and much very heavy work
done, before the seam could be reached again. The belt of serpentine
here is very narrow, and the veins of asbestos are closely pressed
together. The strike is east and west, and the dip 30°.
There are prospects here to the north-east, apparently of as valuable a
character as those of the mine already opened. A few days after my
visit, I was shown some fine samples from the surface work of this
place, where the ground had just been stripped, and these bore the
precise characteristics of the fine vein already spoken of. The
Broughton ore has a pale yellowish hue, as distinguished from the
greenish metallic lustre which distinguishes the finer samples from
Thetford. This does not, it must be observed, in any way deteriorate or
injuriously affect the clear whiteness of the fibre when crushed out,
although it at once identifies the locality of its production. There
are, in fact, as I have already mentioned, certain peculiarities, even
of colour, attaching to the ore of each locality of so marked a
character that an expert can at once tell, on inspection, from what
locality it was obtained.
There is great abundance of soapstone (steatite) at Broughton; much of
it of good quality, and some of it is remarkably pure. I brought away a
singular specimen, having all the grain and even the fibrous markings of
asbestos, which was nevertheless pure and unmistakable unfibred
steatite.
At present no use is being made of this material at Broughton, but at
Wolfestown, in the same province, there is a manufactory for its use,
and here slabs of very fine quality can be procured. A workable bed of
very superior quality has been found also at Potton, and there is
another at South Ham, near the antimony mines on the Lake Nicolet
estate. Reduced to powder, the softness and unctuosity of steatite have
caused it to be used, in the same manner as plumbago, for lubricating
purposes, and when finely ground it is employed for giving a surface to
some kinds of paperhangings.
The substance called Venetian or French chalk, used by tailors and
others, is nothing more than steatite. It can be readily cut with a
knife, and is infusible in any ordinary furnace heat.
Slaty varieties, of which there are many, are comparatively useless.
DANVILLE.
Public-domain text, read in full here on John Shaqi.
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