Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 180
o a given ellipse ABCD, at agiven point P. With C as centre, andradius equal to EA, draw thearc EH, which will give thetwo foci in E and H. Jointhe given point P with E andH, and bisect the angle EPHby the line PK (Prob. 13).PK is the normal. Draw theline NO through P, perpen-dicular to PK. This is… … M _^- K 293. chords and bisect tliem (Prob. 1). Join tlie points of bisectionin each set by lines meeting inC. Produce one of these linestill it meets the given curve inJ), With C as centre, and CDas radius, set off on the givencurve the point A, Join AD.Throuoh C draw a line HKparallel to AD…
Geometrical drawing
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
![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-68-46.webp)
