CLIMATOLOGY 



much tried patience. On July 2 we noted "Thick as a 

 wall outside with an eighty-five miler." And so it com- 

 menced and continued for a day, subsiding slowly through 

 the seventies to the fifties ; and then suddenly redoubling 

 in strength rose to a climax about midnight on July 

 fifth of one hundred and sixteen miles an hour. For eight 

 hours it maintained an average of one hundred and seven 

 miles an hour, and the hut seemed to be jarred and 

 wrenched as the wind throbbed in its mightier gusts. 

 These are probably the highest sustained velocities ever 

 reported from a meteorological station. 



At Cape Evans almost all the surface winds (84.4 

 per cent) came from the east or thereabouts, and about 

 9 per cent from near the north. The steam banner 

 of Mount Erebus showed which w'ay the w^inds were 

 blowing at an elevation of about fifteen thousand feet, 

 and here the chief winds were from the west. The 

 cirrus drift was more or less equally divided from 

 north, west, and east. 



Graham Land. — We owe to R. A. Mossman a discus- 

 sion of the winds in this region, which may be sum- 

 marized as follows. There appears to be a bar of high 

 pressure over the region mentioned which acts as a 

 ''wind divide." Hence the east is under the control of 

 a Weddell Sea low, while the west is affected by a 



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