Van Nostrand's eclectic engineering magazine (1869)
[New York : D. Van Nostrand] · leaf 25
CIRCULAR CURVES FOR RAILWAYS. 13 … t: 7r angles P, Q. Or where this is impossible determine the no by a traverse. Then D n=—. 2D = P + Q, d> PT=PQ4-n-^-, = PQ.|^ PD=PT-£. ^ sin 2D' ^ S2D The last formula fixes the origin. Z=PT-PD. 12. Obstacles: D. The curvature and both tangents: A. When the stations after x are no 1. Point of…
Engineering
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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-271-175.webp)
