. Canadian forest industries January-June 1913. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 44. CANADA LUMBERMAN AND WOODWORKER Preserving Timber A Process Which Greatly Increases the L —Description of Works The artificial treatment of timber of all kinds in order to pre- serve it against decay has made rapid strides of late years. The. growing scarcity of timber is a direct cause of this development. From an economic point of view, however, the time arrived many years ago when preservative treatment was advisable. Today, in Canada, there are a
. Canadian forest industries January-June 1913. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 44. CANADA LUMBERMAN AND WOODWORKER Preserving Timber A Process Which Greatly Increases the L —Description of Works The artificial treatment of timber of all kinds in order to pre- serve it against decay has made rapid strides of late years. The. growing scarcity of timber is a direct cause of this development. From an economic point of view, however, the time arrived many years ago when preservative treatment was advisable. Today, in Canada, there are a few successful plants engaged in this work and others are being promoted which will be in operation in the near future. One of the most interesting of the Canadian plants is that of Messrs. Alex. Bruce & Company, Fort Frances, Ont. This company being connected with the well-known firm of the same name in Great Britain, has had the benefit of their long experience in wood preserv- ing. They were able, therefore, to build a plant and commence opera- tions at Fort Frances, with the certainty that, from the very first, the business would be successful. The plant at Fort Frances was commenced about one year ago. The process in use consists prin- cipally of forcing into the timber zinc chloride solution with sulphate of alumina added. The value of- zinc chloride as a preservative has long been known, but its drawback has been that the zinc chloride would leach out of the wood in a comparatively short time. The ad- dition of sulphate of alumina is made, to overcome this difficulty, and the company state that it prevents the leaching out of the zinc chlor^ ide entirely. Since the completion of the plant it has been in operation day and night, treating railway ties for the Canadian Northern Railway, a company which early saw the great advantage of having its ties preserved against decay. The Canadian Northern are now using pre- served ties over the greater part of their system. Th
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