London : Longman, Rees, Orme, Brown, Green, and Longman · leaf 232
t as to staunchness, &c. The central support of the lower valve-seatis a short hollow column, with radial ribs tostiffen the bottom plate {d d). It will be seenthat adjustments are provided for every part ofthe valve in its place, and that the arrange-ment admits of the utmost facility in… … ■I I I I 1 ■f 10 is I 20., 220 Improved Mtihuds of constructing Valves or Sluices, A* 38
Architecture
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