An ingenious instrument for drawing ellipses and hyperbolas has recently been invented ... the pen or pencil will describe a parabola.

The outer shape is an ellipse with two extra dissimilar conical sections that appear to be a parabola and a hyperbola. Accurate design of an ellipse, parabola and hyperbola all require great ...

Lost Works of Mathematician Apollonius Hidden in Ancient Arabic Manuscript, Proof of Intellectual Exchange Apollonius, the ...