TI1E CENTURY'S PROGRESS IN METEOROLOGY 



from the rule. In the great majority of cases, for ex- 

 ample, in the north-temperate zone, a storm-centre (with 



WATEltSPOUTS IN MID- ATLANTIC 



its attendant local whirl) travels to the northeast, along 

 the main current of the anti-trade-wind, of which it is a 



185 



