. Electrical news and engineering . quality ; it is noteasy to spin, .ind it does not pulp well in the of best grade is extremely rare, and its cost of mining andtransportation is prohibitive. The supply from the Italian mines is rapidly falling off. .As a mailer of fact, Canada contains thegreat asbestos region of the world, in tlie sense thai while itsmines are practictlly unlimited in productive capacity, the productis of a quality which fully meets the requirements of the newestand most exacting of the innumerable uses that are daily beingfound for it. The process of man
. Electrical news and engineering . quality ; it is noteasy to spin, .ind it does not pulp well in the of best grade is extremely rare, and its cost of mining andtransportation is prohibitive. The supply from the Italian mines is rapidly falling off. .As a mailer of fact, Canada contains thegreat asbestos region of the world, in tlie sense thai while itsmines are practictlly unlimited in productive capacity, the productis of a quality which fully meets the requirements of the newestand most exacting of the innumerable uses that are daily beingfound for it. The process of manufacture is intenseU interesting, more espe-cially from the fact that as the industry is constantly enteringupon novel phases, new methods of treatment and special machin-ery have 10 be devised. One of its special uses is for wall paper. One of the largest bmnclies of asbestos manufacture is that ofsectional cylinders for pipe coverings, for retaining the heat ofsteam and other pipes, f«lt protective coverings for boilers, frost-. -ASBESTOS proof protections for gas or water pipes, and cement filling, whichcan be laid on with a trowel, for the covering of steam pipes,boilers or sills. In some of these cases, where it is only neces-sary to retain the heat, the asbestos is mixed with other sub-stances ; but where the protection must be fireproof as well, onlyasbestos is used. The ulilil)- of such covering is well illustratedin the heating system of railway cars. The main pipe from whichthe individual cars draw their respective heat supplies by sidemains, if not covered with asbestos, would lose a large proportionof its caloric from the rapid motion of the car through the interesting innovation in this class of manufacture is asbestossponge. It is not generally known that sponge has great powersof fire resistance. The discovery was made accidentally not longago, and the result was that a consignment of scraps of s|Mngepicked up on the Southern coasts was ordered fo
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidelectricalnewsen06donm
