THE Wns'BS OF THE SOUTHERN HEMISPHESE. 



423 



to find more unsteady winds and fewer rains in that part of the 

 ocean where the observations for the southern part of the tables 

 were made than we should expect to meet with well out to sea, 

 as at the distance of two or three thousand miles to the eastward 

 of Patagonia. So that the contrast presented by the above state- 

 ment would probably be much greater did our observations extend 

 entirely across the South, as they do across the North Atlantic. 

 But as it is, the contrast is very striMng. In some aspects, the 

 meteorological agents of the two hemispheres, especially those 

 forces which control the winds and the weather, diSer veiy much. 

 The difference is so wide as to suggest greater regularity and 

 rapidity of circulation on one side of the equator than on the 

 other. 



822. Average Number of Calms to the 1000 Ohservatiom between the Parallels of 

 Calms in the two 30° and 55^, 171 the North and South Atlantic, and between the 

 hemispheres. Parallels of 30^ and 60*^ in the North and South Pacific Oceans, 



as shown by the Pilot Charts. 



Each one of these observations embraces a period of eight hom'S ; the 

 grand total, if arranged consecutively, with the observations drawn 

 out each to occupy its period separately, would be equal to 373 years. 

 They exhibit several curious and suggestive facts concerning the dif- 

 ference of the atmospherical stabihty in the two hemispheres. 



823. If we would discover the seat of those forces which produce 

 The propelling power this difference in the dynamical status of the tvro 

 of the winds. . ., ^Q^^ aerial oceans that envelop our planet, we should 



