This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. ++++ The below data was compiled from various identification fields in the bibliographic record of this title. This data is provided as an additional tool in helping to ensure edition identification: ++++ Report Of The Geological Exploration Of The Fortieth Parallel Made By Order Of The Secretary Of War According To Acts Of Congress Of Marsh 2, 1867, And March 3, 1869, Under The Direction Of ...: A. A. Humphreys, Chief Of Engineers, Volume 5; Report Of The Geological Exploration Of The Fortieth Parallel Made By Order Of The Secretary Of War According To Acts Of Congress Of Marsh 2, 1867, And March 3, 1869, Under The Direction Of ...: A. A. Humphreys, Chief Of Engineers; Clarence King; Issue 18 Of Professional Papers; Report Of The Geological Exploration Of The Fortieth Parallel; Robert Parr Whitfield United States. Geological Exploration of the Fortieth Parallel, Clarence King, Arnold Hague, James Duncan Hague, Samuel Franklin Emmons, Fielding Bradford Meek, James Hall, Robert Parr Whitfield, Robert Ridgway, Sereno Watson, Daniel Cady Eaton Julius Bien Government Printing Office, 1871 Science; Earth Sciences; Geology; Birds; Botany; Comstock Lode (Nev.); Geology; Mines and mineral resources; Natural history; Paleontology; Science / Earth Sciences / Geology; United States; West (U.S.); lants