The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 133
whilst the wheel is revolving, by interposing a sharp knifewell fixed in a slide. When the velocity necessary to project the ballhorizontally at a given short distance has been ascertained, then byincre.ising the velocity and taking care to discharge the ball from thesame point of the circle, and… … its centrifugal velocity would be —-- = 39-44 feet per4 projectile force. And tlie experiment may he varied by having anumber uf balls prepared of the same weight, and varying the velo-cities and the distances from the centre. The effects of gravity, how-ever, and the difficulty of representing by…
Architecture · Civil engineering · Science
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-400-277.webp)
