Bath-tub vortex

Abstract

WITH reference to Prof. A. H. Shapiro's recent communication1 on the above subject, I venture to call attention to the fact that in 1908 the Austrian physicist, O. Turmlïtz, described careful and effective experiments which demonstrated the effect of the rotation of the Earth on the outflow of water through a central aperture, in a paper entitled "Ein neuer physikalischer Beweis der Achsendrehung der Erde"2. © 1963 Nature Publishing Group.