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The diagram "shows the isotherms in a cyclone of, say, 500 miles in diameter, as indicated by the circle, along which also the direction of the wind is shown by means of arrows." -Waldo, 1896

Isotherms in a Cyclone

The diagram "shows the isotherms in a cyclone of, say, 500 miles in diameter, as indicated by the circle,…

"Profile of a dune, from back to front, showing its relation to the wind. The flow-lines of air are drawn above, with the eddy in front of the dune." -Gilbert, 1910

Dune and Wind

"Profile of a dune, from back to front, showing its relation to the wind. The flow-lines of air are…

"Isobars, isotherms, and winds at various altitudes in a cyclone." -Waldo, 1896

Isobars and Isotherms

"Isobars, isotherms, and winds at various altitudes in a cyclone." -Waldo, 1896

"Isobars, isotherms, and winds at various altitudes in a cyclone." -Waldo, 1896

Isobars and Isotherms

"Isobars, isotherms, and winds at various altitudes in a cyclone." -Waldo, 1896

"The horizontal direction of the wind is usually observed by means of an instrument called the arrow wind vane, the head of the arrow pointing in the direction of approach of the wind. The arrow is free to revolve horizontally around a vertical axis placed near the head." -Waldo, 1896

Arrow Wind Vane

"The horizontal direction of the wind is usually observed by means of an instrument called the arrow…