Exploration of the Colorado River of the West and Its Tributaries Explored in 1869, 1870, 1871, and 1872, Under the Direction of the Secretary of the Smithsonian Institution.

Page Preface xi, Exploration of the Colorado River

PREFACE. Xi graphic work; the final maps will exhibit the results of his learning and executive ability. s Professor Joseph Henry, the Secretary of the Smithsonian Institution, under whose direction the work was performed, prior to the 1 st of July, 1874, has contributed greatly to any success which we may have had, by his instructions and advice, and by his most .earnest sympathy; and I have taken the liberty to express my gratitude for his kindness, and reverence for his profound attainments, by attaching his name to a group of lofty mountains. To the officers of the Union Pacific, the Chicago, Burlington and Quincy, the Utah Central, and other railroads,-1 am indebted for many valuable favors; but for their co-operation the work could not have been accomplished with the means at my command. Many thousands of dollars, in the aggregate, have been contributed by them to the enterprise in the form of free transportation. I earnestly hope that the final result of the work, as a contribution to American science, will not disappoint their expectations. J. W. P. WASHINGTON, D. C., 1875.