Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 78
ance when the arch was invented, probably by abricklayer, spanning widths impossible to horizontal structures.A flat course of stone or brick presses downward only; an archpresses sidewise as well as downward. It is this sidewise thrust,calling into play a new resource, that gives the arch its… … Longest stone arch in the world, Plauen, Germany. was to counteract the outward thrust of these arches that ex-ternal buttresses were reared,either solid, as at St. Remy inRheims, or flying, as at NotreDame in Paris. The Saracenicarch, offering more than halfof a circle, is not so strong asthe…
Inventions · Inventors
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