438 niYSICAL GEOGRArHY OF THE SEA, AND ITS METEOllOLOGY. 



time to stop often or to run back far ; neither have tlie counter- 

 trades of the soutli time to blow backward ; consequently, such 

 being the conditions, avb should also expect to find in the extra- 

 tropical south a gale with easting in it much more seldom than 

 in the extra-tropical nortli. 



821. Gales in the two hemispheres. — We shall aj^peal to observa- 

 tions for the correctness of this conjecture, and claim for it, also, 



as presently will appear, 

 marine meteorology. 



the dignity of an established truth in 



Av^raqe Number {to the 1000 Observations) of Gales, with Easting and with 

 Westing in them, between the corresponding Parallels in the North and South 

 Atlantic, as shoivn by the Storm and Rain Charts. 



Thus the Storm and Eain Charts show that between the parallels 

 of 40° and 55° there were in the northern hemisphere 33,515 

 observations, and that for every 1000 observations there were 

 24 gales with easting and 105 with westing. That in the south- 

 ern, there were 19,473 observations, and for every 1000 of these 

 there were 5 gales with easting and 80 with westing in them. 

 Those for the southern hemisphere are only for that part of the 

 ocean through which vessels pass on their way to and fro around 

 Cape Horn. That part of this route which lies between 40° and 

 55° S., is under the lee of South America ; and Patagonia, that 

 lies east of the Andes, is almost a rainless region ; consequently, 

 we might expect to find more unsteady Avinds 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 statement would probably be much greater did our 

 observations extend entirely across the South, as they do across 



