We cannot account for the things that we can see unless we assume the existence of other things which we cannot; and the "vortex theory" is one of these assumptions.

Some of the most advanced thinkers in modern physical science, in the endeavour to probe the great mystery of the first origin of the world, have postulated the formation of what they call "vortex rings" formed from an infinitely fine primordial substance.

Coalchester will spin soon, and then the disappointed fields around it, then the neighbouring towns would join the reel, and so on and on, faster and faster, madder and madder, till even London itself moves, and the world that changes its axis at the will of any strong spirit will whirl its immeasurable velocities around the vortex pulpit of Theophilus Londonderry.

All that I have said in favor of the model vortex gas composed of perforated solids with fluid circulations through them holds without modification for the purely hydro-kinetic model, composed of either Helmholtz cored vortex rings or of coreless vortices, and we are now troubled with no such difficulty as that of the impacts between solids.

The conception that he forms of a closed current, therefore, is of a vortex sheet having its edge along the circuit of the conducting wire.

He was lurid at the outset, dipping his camel's hair in at the round furnace door sinking toward the hills, whose red vortex shot tongues of flame into canyons and crevasses and drove out their lurking shadows with the fire of its inquisition.

His papers in connection with wave and vortex movements are also most remarkable.