ClipArt ETC
"Suppose a b c to represent a portion of the earth's surface a being towards the north pole, c towards the south pole...The currents of air are supposed to pass in the direction of the arrows. the wind, therefore, for a to b would blow on the surface of the earth, from north to south, while from e to a, the upper current would pass from south to north, untl it came to a, when it would change is direction towards the south." -Comstock 1850

Opposite Currents of Air

"Suppose a b c to represent a portion of the earth's surface a being towards the north pole, c towards…