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Show UNITED STATES ENGINEER OFFICE, GEOGRAPHICAL SURVEYS WEST OF THE 100TH MERIDIAN, In the field, June 30, 1875, GENERAL : I have the honor to submit the following report upon geographical surveys west of the one hundredth meridian for the fiscal year ending June 30,1875. The States and Territories of California, Nevada, Nebraska, Utah, Arizona, Colorado, New Mexico, Wyoming, and Montana had been entered at the close of the season of 1874, during tbe several years' operations of the survey. Of the political divisions lying west of the one hundredth meridian, where actual field- work has not been done, are Oregon and the Territo- | ries of Washington and Idaho, and portions of Dakota, Kansas, and Texas. When ordered, detached or conjoined work may be carried on in one or all of the above, if means and skilled assistants can be made available. The Territory of Alaska was not included in the scheme founded upon the basis of a topographical atlas of the territory of the United States west of the one hundredth meridian that was shortly after the close of the season of 1871 submitted to, and approved by, the Chief of Engineers, and the Honorable the Secretary of War. A similar method ot dividing up its area might be applied in its future survey, with such scale for the resultant maps as shall be dictated by the wants of the Government. SUMMARY OF FIELD AND OFFICE OPERATIONS. ' At the close of the preceding fiscal year, the parties for field- operations had been organized and were commanded as follows: Main and supply division.- In charge of myself, assisted by Lieut. C. W. Whipple, Third United States Artillery, as executive officer. j First division.- Party No. 1, Lieut. W. L. Marshall, Corps of Engineers ; party No. 2, First Lieut. Rogers Birnie, jr., Thirteenth United States Infantry. Second division.- Party No. 1, First Lieut. Philip M. Price, Corps of Engineers; party No. 2, First Lieut. Stanhope E. Blunt, Thirteenth United States Infantry. The field of operations embraced certain areas in Southern and Southwestern Colorado, and Northwestern New Mexico, more specifically described further on, and shown upon the progress- map herewith. In addition to the parties before mentioned, a small astronomical party, in charge of Dr. F. Kampf, observer, assisted by two meteorological observers, determined the astronomical coordinates of Las Vegas and Cimarron, N. Mex.; Julesburg, Colo.; Sidney Barracks and North Platte station upon the Union Pacific Railroad, Nebraska, sending signals to the observatory of the survey at Ogden, in charge for the season of Assistant John H. Clark. A special paleontological and zoological party, in charge of Acting Assistant Surgeon H. C. Yarrow, United States Army, with a subparty under Prof. E. D. Cope, for making collections and geological and paleontological investigations, principally in Northern New Mexico. A special party, in charge of Acting Assistant Surgeon J. T. Koth-rock, United States Army, for making collections in Southern Arizona. |
