London : Longman, Rees, Orme, Brown, Green, and Longman · leaf 524
ining, whether they are bridges, churches, orcathedrals; and, should any diflficulties arise, a hw woodenmodels of arches and bricks, for experiments, will quickly re-move them. The Barrel Drain. — The explanatory diagram {^g. 184.) isto a scale of an §^ in. to 1 in. Let a b c d he a. vertical… … Now, the tendencyof a weight passingover the crown ofthe drain is to com-press it; first, intothe form of an el-lipse, and next intoa straight line, afterthe manner of ahoop; which, whileyielding under thepressure of the hand,continues extendingits two sides. \\\consequence of the^ lower half of…
Architecture
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