Technology
The substance of the following pages was originally comprised in a series of Letters from Canada to a friend in London, who was desirous of obtaining all the authentic information possible on a subject on which so little appears to be generally known.
This, the first regular Canadian mine, was opened up in 1878 by Messrs. Johnson and Ward. The demand at first for the produce of this mine was exceedingly limited; indeed, great...
5. Part 5In connection with the Whitehead torpedoes, we learn from the same authority, that in these and other similar receptacles, within which charges of wet gun cotton are enclosed, t...
4. Part 4Under the hammer the big veins, in which the separation exists, are at once divided into two, or it may be into three lengths of fibre; but if the cotton be pure and clear, this...
2. Part 2Italian differs very materially from Canadian asbestos, not only in appearance, but in formation also, as well as in the mode of extraction. The two are, in fact, entirely separ...
1. Part 1The substance of the following pages was originally comprised in a series of Letters from Canada to a friend in London, who was desirous of obtaining all the authentic informati...
6. Part 6The process of manufacture consists in mixing about 25 per cent. of asbestos fibre with about 25 or 35 per cent. of powdered sulphate of alumina. This mixture is moistened with...