SMITHSONIAN MISCELLANEOUS COLLECTIONS. VOL. 51 



GILMORE. PL. -• 



ig. 1.— PALISADES ON THE YUKON RIVER. 35 MILES BELO */ FORT GIBBON, VIEWED FROM 

 A DISTANCE UP THE RIVER 



Fig. 2. --ELEVATED SILT BLUFFS AT THE PALISADES. SHOWING BLOCKS OF FROZEN SILTS 

 AS THEY ARE UNDERMINED AND SUBSIDE INTO THE RIVER 



