Abstract :
A. E. Knowlton: The principle of aerodynamics which Mr. Varney cites to account for the vibration of the transmission-line conductors is undoubtedly the same one which is found applied in the propulsion of Dr. Floettner´s rotorship. The one difference is that he rotates the rotor and keeps the pressure always in one direction. That is not, of course, the case with the line conductors. The instability there results in alternation of the pressure and consequent vibration of the conductor.
