Called by geologists "asbestus" (the termination in os being the adjective form of the word), the name of the mineral in its Greek form as commonly used (ἄσβεστος), signifies "indestructible." The French adopt the same derivation, calling it "asbeste" (minèral filamenteux et incombustible). In Germany it is called "steinflachs" (stone-flax); and by the Italians "amianto" (from ἀμίαντος, pure, incorruptible); so-called because cloth made from it was cleansed by passing it through fire. Charlemagne, we are told, having a cloth made of this material in his possession, one day after dinner astonished his rude warrior guests by throwing it in the fire, and then withdrawing it cleansed and unconsumed.
As a modern pendent to this well-known legend, the following is current in Quebec. A labouring man, who had left the old country to seek a better fortune in the Dominion, found employment at once on arrival in one of the many lumber yards on the St. Lawrence, where his energy and activity, supplemented by great bodily strength, soon secured for him a good position. It so happened, however, that one evening, on returning from their daily toil to their common apartment, some of his fellow-workmen saw him deliberately throw himself into a seat, kick off his boots, and then pull off his socks, and having opened the door of the stove, coolly fling them in on to the mass of burning wood. Possibly no particular notice would have been taken of this, judged as a mere act of folly and waste on the part of the new-comer; but when, almost immediately afterwards, they saw him open the stove door again, take out the apparently blazing socks, and, after giving them a shake, proceed just as deliberately to draw them on to his feet again, that was a trifle too much! Human nature could not stand that. Consequently the horrified spectators, having for a moment looked on aghast, fled precipitately from the room. To them the facts were clear enough. This, they said, was no human being like themselves; such hellish practices could have but one origin. If not the devil himself, this man certainly could be no other than one of his emissaries. So off they went in a body to the manager and demanded his instant dismissal, loudly asseverating that they would no longer eat, drink, or work in company with such a monster. Enquiry being at once set on foot, it turned out that some time before leaving England the man had worked at an asbestos factory, where he had learned to appreciate the valuable properties of this mineral; and being of an ingenious turn of mind, he had managed to procure some of the fiberized material and therewith knit himself a pair of socks, which he was accustomed to cleanse in the manner described. He was, as has been said, an unusually good workman, consequently his employers had no wish to part with him. Explanation and expostulation, however, were all in vain; nothing could remove the horrible impression that his conduct had made upon the minds of his superstitious fellow-workmen; go he must and did, nor could the tumult be in any way allayed until he had been dismissed from his work and had left the yard.
Leaving this digression, however, it may be said that the peculiar properties of the mineral were known long before Charlemagne's time. The ancients, who believed it to be a plant, made a cere-cloth of it, in which they were accustomed to enwrap the bodies which were to be burned on the funeral pyre, so that the ashes might be retained, separate and intact, for preservation in the family urn, an aperture being left in the cloth to allow a free passage for the flames. How they succeeded in weaving this cloth is now unknown. It has been suggested that its accomplishment was effected by weaving the fibres along with those of flax, and then passing the whole through a furnace to burn out the flax.
The lamps used by the vestal virgins are also said to have been furnished with asbestos wicks, so that the modern adaptation of it to this purpose is only another exemplification of the truth of Solomon's saying that "there is nothing new under the sun."
The mineral has been variously described. In general terms it may be said to be a fibrous variety of serpentine, closely allied to the hornblende family of minerals, the Canadian variety of which is called by mineralogists "chrysotile." In the local vernacular of the mining districts this is "pierre-à-coton" (cotton-stone), perhaps as expressive a term as can be found.
The ore takes a variety of forms; much of it (especially that found in the States) is of a coarse woody character, of but little value for mercantile purposes.
Sir William Logan, in his "Geology of Canada," says that foliated and fibrous varieties of serpentine are common in veins of the ophiolites of the Silurian series, constituting the varieties which have been described under the various names of baltimorite, marmolite, picrolite, and chrysotile. The true asbestos, however, he says, is a fibrous variety of tremolite or hornblende.
In Le Génie Civil for September, 1883, Canadian asbestos is thus described: "La chrysotile du Canada n'est pas comme l'amiante ordinaire formée d'un paquet de fils d'un blanc verdâtre et remplissant des cavités irrégulières: c'est une véritable pierre d'une densité comprise entre 2 et 3, qui se trouve en couches de 3 à 10 centimètres d'épaisseur. Cette pierre possède la propriété de se reduire en fibres perpendiculairement à sa longueur sous un effort très faible. Ses fibres transversales sont plus résistantes et beaucoup plus facile à filer, à tisser, et à feutrer que l'amiante ordinaire." This is as good a description of chrysotile as can be found anywhere.
Until the discovery of the Canadian mines, the variety here spoken of as amiante (amianthus), was esteemed the most rare and delicate kind, on account of its beautifully white, flexible, long, and delicately laid fibres. This variety is generally found buried in the centre of the older crystalline rocks in the Pyrenees, the Alps of Dauphiny, on Mount St. Gothard, in North America, in the serpentines of Sweden, the Ural Mountains, Silesia, and New South Wales. The most beautiful specimens, such as are preserved in museums and mineralogical collections, have mostly been brought from Tarantaise in Savoy, or from Corsica.[1] In this latter place it is said to be so abundant that, its mercantile value being unknown, it has often been used, instead of tow, as a material for packing.
In a handbook published by the Dominion Government in 1882 (before the discovery of the mines of chrysotile) on the mineral resources of Canada, it is said that—