Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 307
y. The first bridge built by man no doubt was of the kind easiestto build—possibly a tree thrown across a stream or ravine. Thus * Presented at the Stated Meeting of the Institute held Wednesday,May 17, 1922. 291 292 Ralph jModjeski. [J.F.I. unwittingly, the man invented the girder. But as early as… … Slab bridge at Chapoo, China. of the Nile and though we have no details of this early structureit must have consisted of at least several girders or even arches. We have mention in history of Lake Villages in the BronzeAge, or about 1400 to 1200 b.c. They consisted of many bridgesbuilt of wood…
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