be the binary cubic whose coefficients a1, are complex numbers represented on the Argand Plane. Then if its roots are z1, z2, z3, the three corresponding points form the vertices of a triangle A1 A2 A3. Let this triad of points be said to represent the cubic. Then its Hessian
is represented by a certain pair of other points; likewise every first polar
associates a definite pair of points (z) with any given point (y).
(Received January 17 1923)
(Revised June 09 1923)