London : Longman, Rees, Orme, Brown, Green, and Longman · leaf 436
in the construc-tion of our most celebrated cathedrals. The following are experiments with arches of unequal span,and of dissimilar forms, placed on piers of different heights, andsupported between two immovable buttresses : — The spans of the arches (?,yi and ^(^^o. 155.) are 10 in., 13 in.,and… … .1 I Now, when a weight of 11 lb. was placed on the crown of thearch g^ it caused the archyto fly up, by the pier b being forced in.A 1 lb. weight, placed on the arch f, just balanced a 21b. weightplaced on the arch g, but caused the arch e to open very much ath ; and half a pound more being added…
Architecture
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