An extreme version of vorticity is a vortex. The vortex is a spinning, cyclonic mass of fluid, which can be observed in the rotation of water going down a drain, as well as in smoke rings, tornados and hurricanes.
Square unit of nondescript frets which interlace in the centre to form a cruciform shape.
I liked to imagine that my father had been a pretty fair country ballplayer who didn't pay attention to his batting average but could hit the ball a country mile and run like the wind.
Gorrus or indigenous seed drills, with one and two seed hoppers, and akkadi tied to the second tine of the drill on the right. There are different sizes of gorrus suitable for sowing different crops.
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