. Canadian forest industries 1916. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 36 CANADA LUMBERMAN AND WOODWORKER July 15, 1916 2t. YzDIA. \Z THP5. PER - WTN6 NUT,5TEEL,GALVANIZED. Fig. 1 The New "Bethlehem" Shell Box The Imperial Munitions Board have issued plans and specifica- tions of a box to be made for the new 18-pounder "Bethlehem" shell. The outside over all dimensions of the box are 27}4 ins. x 10^ ins. x 10^ ins. It will hold four complete rounds, including fuses and fuse covers. The kinds of wood to be used
. Canadian forest industries 1916. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. 36 CANADA LUMBERMAN AND WOODWORKER July 15, 1916 2t. YzDIA. \Z THP5. PER - WTN6 NUT,5TEEL,GALVANIZED. Fig. 1 The New "Bethlehem" Shell Box The Imperial Munitions Board have issued plans and specifica- tions of a box to be made for the new 18-pounder "Bethlehem" shell. The outside over all dimensions of the box are 27}4 ins. x 10^ ins. x 10^ ins. It will hold four complete rounds, including fuses and fuse covers. The kinds of wood to be used are spruce, pine or basswood for the top, bottom, sides and ends, and birch, beech and maple for the top and bottom battens and diaphragms. All metal fittings are to be of mild steel galvanized. The construction of the box is somewhat different from the other boxes that manufacturers are acquainted with. It has a re- movable end which is held in place by a central spindle that passes. through the centre of the box from end to end, fastened with a wing nut. Two small galvanized steel plates are screwed to the bottom and top of the box to keep the head of the bolt and wing nut from cutting into the wood. Fig. 3 shows a side elevation and end elevation of the box and on the side elevation can be seen the central spindle, wing nut and small steel plates in dotted lines. It will be noticed that the wing nut and head of the bolt do not project past the ends of the box. This is to allow of the boxes being piled on top of each other. The battens that go on the ends are mitred and project % of an inch over the end pieces, thus forming a rebate for the end to fit into the box. The three diaphragms or divisions that go inside the box are made of 3-ply hardwood glued up. The centre ply is %. of an inch thick and the two outside plys are 5/16 inches, making a total thick- ness of % of an inch. The specifications state that these thicknesses are nominal, which we take to mean that the total
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectforestsandforestry
