No CrossRef data available.
Published online by Cambridge University Press: 24 October 2008
Prof. W. P. Milne has recently been investigating, in connection with the general cubic surface, the Equianharmonic Envelope S4 and the Harmonic Envelope T6, denned as the envelopes of planes cutting the surface in equianharmonic and harmonic cubic curves respectively: he suggested to me that I should consider the particular case of the quadrinodal cubic surface.