The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 49
er is equal to the length of the given rif;ht line ; let A B, fig. 1,Fig. 1. bn the right line, and C D, h I be p right lines, at right angles to each other, and O the middle point of A. B;•*- then if the extrtmities move alternately on the lines C D, E F, the point O will B 2 describe a circle,…
Architecture · Civil engineering · Science
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