OXli Y Y '~~~pon United States geographical surveys "West of the 100th meridian, in charge of first lieut. Geo. M. vVheeler, corps of engineers, U. S'. army, under the direction of brig. gen. A. A. Humphreys, chief of engineers, U. S. army. Published by authority of the honorable the secretary of war, in aecordanee with acts of congress of june 23, 1874, and february 15, 1875. In 7 volumes, accompanied by one topographical and one geological atlas. V01. I. Geographieal Report. (Mit 38 Taf. und 3 Karten.) Vol. H. Astronomy and barometrie hypsometry. (Mit 22 Taf.) Vol. UI. Geology. (Mit 13 Taf., 1 Titelkupfer, 4 Beilagen.) Vol. IV. Paleontology. (Mit 83 Taf.) Vol. V. Zoology. (Mit 45 'l'af.) Vol. VI. Botany. (Mit 31 Taf.) Vol. VII. Archaeology. (Mit 20 Taf., 1 Karte, 1 Bild.) List of Reports and Maps of the United States geographical surveys West ofthe 100thmeridian. GeorgeM. Wheeler, captain corps of engineers, U. S. army, in charge. Second edition. (Mit 1 Karte.) r8 Bde.) 4. Washington 1875-1889.