. Transactions. ly increasing. Among the uses to whichit is put may be mentioned : packing in various forms ; covering forsteam boilers and pipes ; firemens clothes ; theatre curtains ; boxesfor money and valuable papers ; covering for walls and roof; acidfilters; powder bags; etc., etc. As a matter of fact the demand for asbestos has been so great oflate years that the opening of new mines has scarcely been able to keepup the required supply. Chemically, asbestos is a silicate of magnesiaand lime—however with a fluctuating ratio of its constituent and aluminium are generally associ
. Transactions. ly increasing. Among the uses to whichit is put may be mentioned : packing in various forms ; covering forsteam boilers and pipes ; firemens clothes ; theatre curtains ; boxesfor money and valuable papers ; covering for walls and roof; acidfilters; powder bags; etc., etc. As a matter of fact the demand for asbestos has been so great oflate years that the opening of new mines has scarcely been able to keepup the required supply. Chemically, asbestos is a silicate of magnesiaand lime—however with a fluctuating ratio of its constituent and aluminium are generally associated with it. The asbestos of commerce contains about 14 per cent, of water,while a variety, which is, however, only of interest to the mineralogist,is almost wholly free from water, or only slightly hygroscopic. The following table, taken from the admirable work Asbestosand Asbestic of R. H. Jones, of Montreal, gives the analyses of theprincipal kinds of commercial asbestos. 344 The Canadian Mining Asbestos atid its Production in Canada. 345 ?
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Keywords: ., book, bookcentury1800, booksubjectmineralindustries, bookyear1895
