The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 124
ssel can be measured, so as to ascertain it, at any instant,with the necessary precision. In the absence of a better, the fol-lowing arrangement might perhaps he adopted with advantage :— To the bowsprit of the vessel (Fig. 1), sufficiently a-head to bebeyond the disturbed water, should be screwed… … Fig. I.a metal sphere should be fitted, so as to be fixed at any requireddistance from the point of suspension ; from the upper extremitvof the rod, a small cord or wire should be brought, passing to someconvenient spot on the fore-part of the deck, where it should beattached to one arm of a…
Architecture · Civil engineering · Science
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