Newton's Principia, sections I, II, III, with notes and illustrations. Also a collection of problems (1863)
Newton, Isaac, Sir, 1642-1727, Frost, Percival, 1817-1898 · Cambridge, London, Macmillan and Co · leaf 163
AD, ad tangents at A, a, ACSG, acsg diameters throughA, a. Join A B, ab, and draw BO, be perpendicular toA G, ag. By similar triangles, AC : AB :: AB : AG,:. A C.AG= (chord AB)2 ; . (chord A Bf . (chord ab)2ac \ \ - ~ - * - — — <AG ag IllOP. IV. THEOREM IV. 145 But, ultimately, when the arcs…
Mechanics · Celestial mechanics
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Cosmographia Francisci Mavrolyci Messanensis Sicvli : in tres dialogos distincta, in quibus de forma, situ numerʹoq[ue] tam coelorum q[uam] elementorum, alijsq[ue] rebus ad astronomica rudimenta spectantibus satis disseritur (1543)](https://img.insideoutlibrary.com/img/200/ia-cosmographiafran00maur-162-0.webp)
