Proceedings of the Edinburgh Mathematical Society, Volumes 16-19

algebraic angles axes axis B.Sc Betti's Theorem centroid circumcircle circumscribed coaxaloid system College conic coordinates corresponding cosC cosh D.Sc definition denote determined deux displacements droites Edinburgh EDINBURGH MATHEMATICAL SOCIETY ellipse envelope equal equation Euclid's fluxions function geometrical George George Heriot's School George Watson's College given Glasgow Hence hyperbola II-points inscribed integral intersection irrational number isogonal isotomic conjugate l'équation l'on limit line at infinity LL.D locus magnitudes Mathematical Society meet method Newton nine-point nine-point circle obtain orthocentre pairs parallel perpendicular Philalethes plane polar pole positive Professor of Mathematics proof proportion proposition proved quantities racines ratio rectangle respect S-point system School sides of ABC similar sinh solution square Steiner ellipse straight line surface symmedian symmedian point system of circles tangents theorem touches transformation triangle ABC vanishes variable vertices zero