The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 278
y. The pressure which an opposite scnu-arch would produce ui>o-n the side AC of the key-stone, tig. 2, is ecpual to thetendency of that semi-arch to revolve forwards upon the inferior edges ofone or more of its voussoirs. Now this tendency to motion is evidently equalto the least force which… … Suppose the mass ABDC, tig. 1, to be acted upon liy ajiy number of forceamong which is the force Q being the resultant of certain resistances, suj)-plied by different points in a surface BU, connuou to the intersected massaiul to an immoveable obstacle BE. Now it is clear that under these…
Architecture · Civil engineering · Science
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![An illustration from Cosmographia in qvatvor libros distribvta summo ordine, miraqve facilitate, ac breuitate ad magnam Ptolemæi mathematicam constructionem, ad vniuersamque astrologiam institutens. Francisco Barocio ... avtore. Cum præfatione eiusdem autoris, in qua perfecta quidem astrologiæ diuisio, & enarratio autorum illustrium, & voluminum ab eis conscriptorum in singulis astrologiæ partibus habetur: Joannis de Sacrobosco verò 84 errores, et alij permulti suorum expositorum, & sectatorum ostenduntur. rationibusq[uam] redarguuntur. Præcesserunt etiam quædam communia mathematica, necnon arithmetica, & geometrica principia, nonnullæq[uam] propositiones, de quibus in toto opere sæpe fit mentio: ac demum locupletissimus index eorum, quæ ipsa Cosmographia continentur .. (1585)](https://img.insideoutlibrary.com/img/200/ia-cosmographiainqv00baro-448-118.webp)
