London : Longman, Rees, Orme, Brown, Green, and Longman · leaf 76
cted, of ten voussoirs, from 1 toQ\ 10 ; and g^ the perpendiculari pulley, with the string and,, A weight o; ?, the horizontalpulley, with the string andweight p: the following arethe results, beginninff withNo. ]., and descending toNo. 10., taking away eachvoussoir after ascertaining the two… … 56 Principles of Construction in Arches. No. 3. has no perpendicular pressure, but ^ of a lb. of horizontalweight. No. 4. has no perpendicular pressure, but ^ of a lb. of horizontalweight. No. 5. has no perpendicular pressure, but is sustained by a hori-zontal force of I of a lb.Experiment Second,…
Architecture
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