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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 Excerpt:... quite possible, and according to our hypothesis highly probable, that in equatorial regions the air at an altitude of several thousand meters may be warmer at sun-spot maxima than nt minima, thus reversing the conditions at the earth's surface. It is even possible that when the total body of air Is considered the temperature may correspond with the intensity of solar radiation, and vary In a way quite different from that observed at the surface. It must be remembered, however, that when warm air is carried upward it stays there a long time. It has an opportunity to radiate its heat into spnce more rapidly than would be possible If it remained near the surface. Thus increased radiation from the upper air may largely neutralize the effects of more rapid convection. Hence the differences to be expected In the location of the isothermal layer need not necessarily be great. Another way in which the cyclonic form of the solar hypothesis may be tested Mhs well illustrated at the meeting of the Pan American Congress where this jwier was presented. Arctowskl, in his contribution printed In this volume, shows that the year 1911 was peculiar. In most parts of the world there was a general pleionlan rise in temperature corresponding to an Increase in the ticiivity of solar faculte. The center of the United States, however, showed a distinct reversal, for although the surrounding areas were characterized by a temperature above the normal, our Central States fell below the normal. In explanation of this anomaly Kullmer showed his map of storminess in the Vnited States for 1911, a map which unfortunately has not yet been published A comparison of this map with the average map for 30 years and with individual maps of other years shows that 1911 was characterized by a pecu...