. Canadian forestry journal. Forests and forestry -- Canada Periodicals. 452 Canadian Forestry Magazine, October, iq2o. too little surface area to effect the audi- tory nerve. The sound board which is connected with the strings through the bridge increases their vibrating surface many thousandfold. In building up the sounding board only the most elastic lumber can be used which will produce vibrations with a minimum expenditure of power. The quartered wood is cut so that the ''season rings" run at right angles to the grain, and the many strips which go to make up a sounding board are betw
. Canadian forestry journal. Forests and forestry -- Canada Periodicals. 452 Canadian Forestry Magazine, October, iq2o. too little surface area to effect the audi- tory nerve. The sound board which is connected with the strings through the bridge increases their vibrating surface many thousandfold. In building up the sounding board only the most elastic lumber can be used which will produce vibrations with a minimum expenditure of power. The quartered wood is cut so that the ''season rings" run at right angles to the grain, and the many strips which go to make up a sounding board are between 3 and 4 inches in width. Those strips which have a wide grain are placed opposite the bass strings and those with the closer grain are opposite the trel)le. The board is glued together in the rough, is al)out one-half inch lliick, and it is planed and sandpapered down to a finished thickness of from a quarter in the base to three- eighths of an inch in the treble end. This is the work of a specialist and calls for a great degree of skill. A series of paral- lel pine battens or ribs are firmly glued to the back of the sounding board to S'lengthen it and also to give to the board the correct curve. A curved maple strip known as the bridge which is about 1 inch by 1 1-8 inches is fitted diagon- ally across the sounding board. The Plate. As mentioned before, the back or â 'rim'' is the foundation of a piano. We i. These are the powerful presses in which the pieces of veneered wood are placed, after the gluing process. The piano case itself is trade of Ash, on which are glued four thin layers of mahogany or walnut veneer. The engraving shows a number of sections in the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Canadian Forestry Association. [Ottawa] : Canadian Forestry Association
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