Fig. 21. — HyiJOtlietloal restoration of the relative positions of areas of Jiu/h and low 

 barometric pressure, and of the prevalent direction of the winds, in the 

 Northern Hemisphere, during the maximum glaciation of Europe. 



WINTER. 



; Regions supposed to have, been .glaciated. 

 ii!s^-> jPjce.valeat storm -tracks. 



Supposed AnMean' continent, 

 Ere.valent winds. 



