London : Longman, Rees, Orme, Brown, Green, and Longman · leaf 389
pier is 19 ft. 6 in.; therefore, these may be allowedto be within the balancing dimensions by one third of their trueheight. These arches and piers were submitted to experiment by amodel; and the result was, that a single arch and pier balancedunder one third of the weight of its pier, the masonry… … a^ follows : — The span between the piei-s is 9 ft. 6 in. Theheight of the piers is 15ft. Sin. The height of the shaft is13 ft. The diameter of the piers, which are circular, is 5 ft.The height of the masonry above the arches is 2^ ft. In 9 ft. 6 in. there are 114 in., which, divided by 6, gives19…
Architecture
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