Bui. 86, Forest Service, U. S. Dept. of Agriculture. 



PLATE XII. 



FIG. 1. DUNES OF SAND BLOWN OUT OF THE BED OF THE COLUMBIA RIVER, SHERMAN 



COUNTY, OREQ. 



FIQ. 2. SAND ENCROACHING ON A RAILROAD TRACK, HELD IN CHECK BY PLANTING 

 OF WILLOWS. NEAR THE DALLES, OREG. 



