4. On Vortex Atoms | Proceedings of the Royal Society of Edinburgh | Cambridge Core (original) (raw)

page 99 note * The diagram represents precisely the convex outline referred to, and the lines of motion of the interior fluid carried along by the vortex, for the case of a double vortex consisting of two infinitely long, parallel straight vortices of equal rotations in opposite directions. The curves have been drawn by Mr D. M'Farlane, from calculations which he has performed by means of the equation of the system of curves, which is

The proof will be given in the mathematical paper which the author intends to communicate in a short time to the Royal Society of Edinburgh.