CONTENTS. 



Report of Mr. James Doty of a reconnaissance from Fort Benton to Cantonment Stevens, and of a survey from Fort 



Benton to Olympia. Olympia, W. T., January 1,1855 553 



Letter of Mr. L. Blodget to Captain A. A. Humphreys, transmitting general notes on the climate on route near the 



forty-seventh and forty-ninth parallels. Washington, D. C., August 14, 1855 506 



^ General notes on the climate on the route near the forty-seventh and forty-uinth parallels, by Mr. Lorin Blodget 566 



Meteorological observations made at Fort Benton, by Mr. James Doty 572 



Letter of Lieutenant John Mullan, U. S. A., to Governor I. I. Stevens, transmitting meteorological register kept in 



the St. Mary s valley. Olympia. W. T., December 17, 1854 585 



Meteorological observations made at Cantonment Stevens, St. Mary s valley, by F. H. Burr, of Lieutenant Mullan s 



party : 586 



Summary of meteorological observations at Fort Pierre, Missouri river 599 



Summary of barometric and temperature observations at Columbia Barracks, &quot;Oregon, from July to December, 1653, 



and for four months of 1854 599 



Summary of meteorological observations at Olympia, W. T 601 



Barometric and meteorological observations made during the survey of a line from Columbia Barracks to Fort Colville 



and the return, by Lieutenant S. Mowry, U. S. A 602 



Table of altitudes from Columbia Barracks to Fort Okinakane 613 



Eise and fall of the Columbia River at Fort Vancouver 614 



Letter of Governor I. I. Stevens to A. W. Tinkham. Olympia, W. T., December 12, 1853 617 



Letter of Governor I. I. Stevens to the Secretary of War. Olyropia, W. T., December 30, 1853 619 



Letter of Governor I. I. Stevens^to the Secretary of War. Olympia, W. T., January 31, 1854 621 



Letter of Captain G. B. McClellan, corps of engineers, to Governor I. I. Stevens. Olympia, W. T., January 31, 1854. 622 



Letter of A. W. Tiukham to Governor I. I. Stevens. Fort Wallah- Wallah, January 2, 1854 625 



Letter of A. W. Tinkham to Governor I. I. Stevens. Olympia, W. T. , February 1 , 1 854 629 



Letter of Governor I. I. Stevens to the Secretary of War. Olympia, W. T., February 13, 1854 631 



Letter of the Secretary of War to Governor I.I. Stevens. Washington, April 1 2, 1854 632 



Letter of Governor I. I. Stevens to the Secretary of War. Olympia, W. T., March 6, 1854 633 



Letter of Lieutenant Mullan, U. S. A., to Governor I. I. Stevens. Cantonment Stevens, W. T., January 12, 1854 .... 633 



Letter of Lieutenant A. J. Donelson, corps of engineers, to the Secretary of War 635 



Note in reference to a subsequent volume 636 



