Context of Letter of the Secretary of the Treasury, communicating a report of a geological reconnoissance of the Chippewa land district of Wisconsin, and the northern part of Iowa, by David Dale Owen. June 22, 1848. -- Read, and ordered to be printed. June 24, 1848. -- Reconsidered, and referred to the Committee on Public Lands. July 3, 1848. -- Ordered to be printed, and that 2,000 additional copies be printed for the use of the Senate.