Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 68
58 MECHANICS OFSOLIDS. … pieces are held in position by one let in from above (A, Fig.65) called a key. Rightly proportioned, itis the strongest possible arrangement ofmaterials to bear a crushing weight, for theload is so distributed as to be perpendicu-lar to each block, and it maintains its po-sition until one is…
Physics
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