CONTENTS. Vll 
Page. 
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.... 566 
General notes on the climate on the route near the forty-seventh and forty-ninth 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, Oregon, from July to December, 1853, 
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 8. Mowry, U. S. A. 602 
Table of altitudes from Columbia Barracks to Fort Okinakane. 613 
Rise 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. Olympia, 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. Tinkham 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, 1854 . 629 
Letter of Governor 1.1. Stevens to the Secretary of War. Olympia, W. T., February 13, 1854. 631 
Letter of the Secretary of War to Governor 1.1. Stevens. Washington, April 12, 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 
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