. Canadian forest industries 1880-1881. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. None genuine unless with a STAR on the head of rivets. Send for Price Lists and Discounts. 241/26 81 Colborne Street, Toronto The Strength of Wood. At the late fair of the Massachusetts Charit- able Mechanics' Association, held at Boston, there were exhibited interesting tests of con- structive material, among these, of pine columns, which had, in some instances, supported re- markable pressure. One of these columns, originally twelve feet long, yielded to a pres
. Canadian forest industries 1880-1881. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. None genuine unless with a STAR on the head of rivets. Send for Price Lists and Discounts. 241/26 81 Colborne Street, Toronto The Strength of Wood. At the late fair of the Massachusetts Charit- able Mechanics' Association, held at Boston, there were exhibited interesting tests of con- structive material, among these, of pine columns, which had, in some instances, supported re- markable pressure. One of these columns, originally twelve feet long, yielded to a pressure of 190,000 pounds ; the weak spot being a large knot, which acted as a wedge, and caused the destruction of the column at less than the pro- per figures for a sound piece. Another column was twelve feet long, and tapering from seven and three-fourths to six and a half inches in diameter. This stick showed its weakest point at the smaller end, the crumbling of the fibres taking place in that part. A seasoned hard pine girder, eleven inches square and ten feet long, bore the astonishing load of 751,000 pounds.â Northwestern Lumberman. How to Use Oil Stones. Instead of oil, which thickens and makes the stones dirty, a mixture of glycerine and alcohol is used by many. The proportions of the mix- ture vary according to the instrument operated upon. An article with a large surfaceâa razor, for instanceâsharpens best with a limpid liquid, as three parts of glycerine to one of alcohol. For a graving tool, the cutting surface of which is very small, as is also the pressure exercised on the stone in sharpening, it is neces- sary to employ glycerine almost pure, with but two or three drops of alcohol. A World ok Good.âOne of the most popu- lar medicines now before the American public in Hop Bitters. You see it everywhere. People take it with good effect. It builds them up. It is not as pleasant to the taste as some other Bitters, as it is not a whiskey drink. It is mure like the
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectforestsandforestry
