A London encyclopaedia, or universal dictionary of science, art, literature and practical mechanics : comprising a popular view of the present state of knowledge : illustrated by numerous engravings, a general atlas, and appropriate diagrams (1829)
Curtis, Thomas, fl. 1820 · London : Thomas Tegg · leaf 534
nd a centre, and from thatcentre, with this opening, describe the arc B C,in the same manner as N K or A B were described.There are various ways of describing the arc Kp,some describe it on a centre at the distance ofnine brims from the points ip and K; others, asit is done in the figure, on a… … with the radius Cl, describe the arc Xipn; bi-sect the part 1 2, of the line D n, and, erectingthe perpendicular p m, this perpendicular willcut the arc \fn in 7«, which terminates therounding 1 p. Some founders make the bend-ings, K, a third of a brim lower than the middleof the line D N; others…
Encyclopedias and dictionaries · Aeronautics
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