Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific OceanUnited States. War Department1855-60.engBEIN Zc10 +855unc: Another issue. Senate ex. doc. 78.BEIN BrSides Elephant Folio Zc10 855uq: Imperfect: Section 4, sheet II, Section 5, sheet III (2 copies), Section 5, sheet V, and Section 6, sheet IV, Section 9, sheet VI, and Sections 12, 13 & 14, plate VIII for volume 5 only.BEIN BrSides Zc10 855ur: Imperfect: plates "Goshoot passage," "Valley of the Humboldt River at Lassen's Meadows," "Valley of the Mud Lakes," "Madelin Pass, and "Northern slopes of the Sierra Nevada" from volume 11 only.Vols. I-XI were issued in the Congressional series of U.S. public documents as 33d Cong., 2d sess. House ex. doc. 91, and also as Senate ex. doc. 78. Vol. XI was issued also (1861) as 36th Cong., 2d sess. Senate ex. doc. [no number]Supplement to vol. I (the material of which was published also in vol. XII, book I and book II) was issued in at least three forms: Supplement to vol. I, 1859, W.A. Harris, printer, as 35th Cong., 2d sess. Senate ex. doc. 46--Vol. XII, book I-II, 1860, T.H. Ford, printer, as 36th Cong., 1st sess. House ex. doc. 56, and Senate ex. doc. [no number]The reports of the Pacific Railroad surveys were prepared under the direct supervision of the Engineer Department. The volumes dealing with the soil, climate, geology, botany and zoology of the regions surveyed were edited and revised by Professors Henry and Baird, of the Smithsonian Institution. cf. Ingersoll, Hist. of the War Department. 1879, p. 292-293.