McLOUTH ON DUST SHOWER. 



171 



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Map2 



Map showing wiud directions and velocities in relation to loess soil regions January 26r 

 1902. Data taken from reports of U. S. Weather Bureau. 

 Snow covering was essentially as shown on map of January 27. 

 The loess is shaded. 



The known extent of loess in the United States is in comparatively 

 narrow belts along the rivers Mississippi, Missouri and Ohio. Its near- 

 est approach to Grand Haven is in southern Wisconsin, distant 150 

 miles. It extends westward across Missouri and southern Iowa beyond 

 Omaha and Sioux City, more than 500 miles from the east shore of Lake 



Michigan. 





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Map 3 



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. Map showing wind directions and velocities, also approximate extent of snow covering, in 



relation to loess soil regions, Jannarv 2.'>, 10(V2. 

 Meteorological data taken from reports of V. S. Weather Bureau. 

 Approximate lioundary of the loess is shown l)y dotted line. 



