THROUGH the laws of vortex motion have been extensively examined by the ablest mathematicians, comparatively few experiments appear to have been made to study the nature of these motions in air and liquids beyond some experiments made about 1867 by Prof. P. G. Tait, who examined the properties of smoke rings in air. In an extended experimental investigation of this subject the present writer found that very beautiful vortex motions may be easily produced in such high-density fluids as water and oils which have free surfaces and small viscosity. The study consisted in examining the various properties of single and double rings, both visually and with the aid of the camera.
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Journal of Mathematical Sciences (2012)