London : Longman, Rees, Orme, Brown, Green, and Longman · leaf 377
/ L \ \ 1 2 1 1 1 f 136 Fig. 138. is an experiment with a double voussoir arch,placed on a pier, the base of which measures 4 in. by 4 in., and * The result here was, that the arch carried my weight (a weight equalhng147 lb.), because a straight line could be drawn from the weight at a, throughthe… … 137 e \ n__J {_ / / - .. /.■■/ ft \ 1 1 1 1 1 1 1 3 1 1 f II •-■i_ ; / - •, \ /i ^ 1 / / ••-. •( ■ / 1 11 .- 1 / 1 i ; /\ _, ) 1 ^ J i 1 l\/ 21 in. in height; and which answers to the third experiment inthe table relative to Jig. 136. This double arch balanced with
Architecture
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
![An illustration from The American archaeologist [serial] (1898)](https://img.insideoutlibrary.com/img/200/ia-americanarchaeol02colu-82-44.webp)
