Buys Ballot, Christoph. "Note sur le rapport de l'intensité et de la direction du vent avec les écarts simultanés du baromètre", in Comptes rendus hebdomadaires de l'Académie des sciences, 1857, volume 45, pp 765-768. Offered in the original weekly issue, without the outer wrappers, removed from a larger bound volume. $250
"Buys Ballot's law may be expressed as follows: In the Northern Hemisphere, if a person stands with his back to the wind, the atmospheric pressure is low to the left, high to the right.” "[It] asserts that actual winds are approximately geostrophic, that is, such as to balance the pressure gradient and Coriolis forces"--Claire Parkinson, Breakthroughs (for 1857). The law was first deduced by the American meteorologists J.H. Coffin and William Ferrel, is a direct consequence of Ferrel's law. The law takes its name from C. H. D. Buys Ballot, a Dutch meteorologist, who published it in the Comptes Rendus, November 1857.[The issue offered here.]While William Ferrel theorized this first in 1856, Buys Ballot was the first to provide an empirical validation.”--Wikipedia ([Buys-Ballot] derived the law empirically, unaware that it already had been deduced theoretically by the U.S. meteorologist William Ferrel, whose priority Buys Ballot later acknowledged."--Ency Britannica)
“The underlying principles of Buys Ballot's law state that for anyone ashore in the Northern Hemisphere and in the path of a hurricane, the most dangerous place to be is in the right front quadrant of the storm. There, the observed wind speed of the storm is the sum of the speed of wind in the storm circulation plus the velocity of the storms forward movement. Buys Ballot's Law calls this the "Dangerous Quadrant". “--Wikipedia
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