. Timber and timber trees, native and foreign . Timber; Trees. 298 TIMBER AND TIMBER TREES. [chap. considered one of the best woods for working that the carpenter can take in hand. There are many experiments on the strength of the Kauri Pine, and the first to be noticed are on specimens taken from the butt-end of a log that was fully 60 feet in length and 22 inches square. A plank 2 inches thick having been taken out of the middle, it was cut to produce six pieces of 2 X 2 X 84 inches, four upon one side of the centre or pith and two upon the The centre piece was excluded from. FIG. 33- other
. Timber and timber trees, native and foreign . Timber; Trees. 298 TIMBER AND TIMBER TREES. [chap. considered one of the best woods for working that the carpenter can take in hand. There are many experiments on the strength of the Kauri Pine, and the first to be noticed are on specimens taken from the butt-end of a log that was fully 60 feet in length and 22 inches square. A plank 2 inches thick having been taken out of the middle, it was cut to produce six pieces of 2 X 2 X 84 inches, four upon one side of the centre or pith and two upon the The centre piece was excluded from. FIG. 33- other (Fig. 33) the test as being of too weak a nature to bear com parison with the rest of the wood. Table CLX.—Kauri (New Zealand). Transverse Experiments, Number of the specimen. Deflections. Total weight required to break each piece. II 03 Ul Weight reduced to specific gravity 600. Weight required to break I square inch. With the apparatus weighing 390 lbs. After the weight was removed. At the crisis of breaking. 1 d 2 C 3* 4<z lb' Inches. 1-25 1-25 1-15 I-OS i-iS 1-5° Inch. •00 •15 •10 -00 -10 •IS Inches. 375 4-25 4-20 375 3 "40 4-15 lbs. 818 87s 820 7SO 760 870 525 529 529 520 ^\^ 562 934 992 930 865 88s 929 lbs. 131-25 132-25 132-25 130-00 128-75 140-50 Total . 7-35 •so 23-50 4893 3180 5535 795-00 Average 1-225 •083 3-916 815-5 530 917 132-50 Remarks.—These specimens broke with a moderate length of fracture. E = 790810. S = 2141. The table shows that transversely the strongest point was much nearer to the more recently-formed con-. 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 Laslett, Thomas. London : Macmillan
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherlondo, bookyear1875
