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Caption: Board of Trustees Minutes - 1871
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142 A DISCOUKSE ON CLIMATE. BY PROFESSOR J. B. TURNER, OF JACKSONVILLE. HGBTHAPOLE- jSQUTH POLE EXPLANATION AND REMARKS ON THE DIAGRAM. I. The Meridianal or diurnal line or belt of maximum heat (A. B.) revolves round the globe every twenty-four hours, with the sun, and over each meridian about three o'clock in the afternoon, at right angles to the equator. The Equatorial, or annual line, or belt or zone, of maximum heat, on the contrary, swings from north to south between the tropics parallel with the equator, advancing and receding with the sun, and the returning seasons of each year. The point, or area, or focus, of greatest heat on the globe is where these two lines intersect, as at O O O, which point of course revolves around the globe every twenty-four hours, and tends to draw all the great surface aircurrents after it, and to deflect all the other currents toward it. The upper return currents of air, including what are called the counter trade winds, move in directly the opposite direction to the surface currents (as indicated by the arrow-heads of the diagram), when not disturbed by local forces. The perpetual intersection of the several parts of this great cross-belt of
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