SNOWS OP THE ROCKY, BITTEK ROOT, AND CASCADE MOUNTAINS. 



399 



37. REPORT OF MR. TINKHAM OF THE SNOWS OF THE ROCKY MOUNTAINS IN NOVEMBER, OF THE 

 BITTER ROOT IN DECEMBER, AND OF THE CASCADES IN JANUARY. 



WASHINGTON, D. C., August 12, 1854. 



SIR: As requested in your note of to-day, I give herewith, in brief, facts relating to snow as 

 they were noticed in my recent exploration. 



In October, 1853, I left the valley of St. Mary s river; passing to the eastward, and recrossing 

 the Rocky mountains, was in the prairies at their eastern base from late in October to near the 

 middle of November; crossed again the Rocky mountains about the middle of November; was 



