London : Longman, Rees, Orme, Brown, Green, and Longman · leaf 431
reduced to 6 in. in height, it will carry 3 lb. well, or twice theweight of the pier of six bricks. Relative to the Roman Arch Jig. 150. — This arch balanceson the pier a b, which is 9 in. high ; having the same base asJig. 149. The arch projects within the pier, at a, half an inch. 150 … Min.. When the dimensions of the bases of these pillars supportingthe Gothic and Roman arches are increased to 4 in. by 4 in.,these arches will then balance at the height shown hyjigs. 151.and 152. 411 iti Arches^ PieiSf and Buttresses,The Gothic arch ^g. 151. balances on the pier a b, of 32 in.…
Architecture
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