. Elementary lessons in the physics of agriculture. Agricultural physics. [from old catalog]. 41 or C, Fig. 19, it should require just four times the load to break it, because the board is practically converted into two levers whose j^ower-arms remain the same, but whose weight-arms are only one-half as long each. 72. The Transverse Strength of Timbers Propor- tional to the Sqnares of their Vertical Thicknesses.— Common experience demonstrates that a joist resting on edge is able to carry a much greater load than when ly- ing flatwise. If we place a 2 x 4 and a 2 x 8, which differ only in thic
. Elementary lessons in the physics of agriculture. Agricultural physics. [from old catalog]. 41 or C, Fig. 19, it should require just four times the load to break it, because the board is practically converted into two levers whose j^ower-arms remain the same, but whose weight-arms are only one-half as long each. 72. The Transverse Strength of Timbers Propor- tional to the Sqnares of their Vertical Thicknesses.— Common experience demonstrates that a joist resting on edge is able to carry a much greater load than when ly- ing flatwise. If we place a 2 x 4 and a 2 x 8, which differ only in thickness, on edge, their relative strengths are to each other as the squares of 4 and 8, or as 16 to 64. That is, the 2x8, containing only twice the amount of lumber as the 2 x 4, will, under the conditions named, sustain four times the load. The reason for this is as follows: In Fig. 20 let A represent a 2 x 4 and B a 2 x w tn. 14/. 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 King, F[ranklin] H[iram], 1848- [from old catalog]. [Madison, Wis. ] State journal printing company
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Keywords: ., bookcentury1800, bookcontributorthe, bookdecade1890, bookyear1891
