First published in 1883, Joseph John Thomson’s fascinating treatise explores the subject of ‘vortex rings’. A vortex ring, also known as ‘a toroidal vortex’, is a torus-shaped vortex existing within a fluid or gas where the fluid spins along an imaginary axis line that creates a closed loop. Sir Joseph John Thomson (1856 - 1940) was an English physicist and Nobel Laureate in Physics. He is most famous for having discovered and identified the electron, and discovering the first subatomic particle. He also proved that cathode rays were composed of electrons. In 1906, Thomson was awarded the Nobel Prize in Physics for his contributions to the study of the conduction of electricity in gases. Contents include: Momentum Of A System Of Circular Vortex Rings , Moment Of Momentum Of The System , Kinetic Energy Of The System , Expression For The Kinetic Energy Of A Number Of Circular Vortex , Rings Moving Inside A Closed Vessel , Theory Of The Single Vortex Ring , Expression For The Velocity Parallel To The Axis , Due To An Approximately , Circular Vortex Ring , etc. Many vintage books such as this are increasingly scarce and expensive. It is with this in mind that we are republishing this volume now in an affordable, modern, high-quality edition complete with the original text and artwork.