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Show Number of astronomical positions computed 55 Number of sheets plotted 15 Number of cistern- barometer altitudes computed 872 Number of aneroid- barometer altitudes oompu ted 3,965 Number of atlas- maps ( 1 inch to 8 miles) published 8 Number of atlas- maps ready for publication :? Number of atlas- maps partially completed * 2 Number of atlas- sheets ( 1 inch to 8 miles and 1 inch to 4 miles) in course of preparation 13 Number of reports published 5 Number of reports in conrse of publication 2 Number of reports nearly readv for publication 4 N„ ml, er of m . p 8 d i s t r i b u t e d ^ J * * J £ £ %* \ 7,864 PERSONNEL. The following changes of officers upon the work have occurred during the year: Lieut. Philip } 1. Price, Corps of Engineers, relieved May 5, 1875; Lieut. Stanhope E. Blunt, Ordnance Corps, relieved December 30, 1874; Lieut. Eric Bergland, Corps of Engineers, joined May 21, 1875; Lieut. C. C. Morrison, Sixth United States Cavalry, joined June 5,1875; Lieut. W. L. Carpenter, Ninth United States Infantry, joined May 22, 1875; and the following assistant engineers have been employed : ASTRONOMICAL OBSERVERS. Dr. F. Kampf, the whole year. J John H. Clark, from July 7 to Nov. 7,1874. TOPOGRAPHERS. R. J. Ains worth, July 7 to Sept. 5, 1874. W. R. Atkinson, July 7, 1874, to Feb. 28, 1875. Frank Carpenter, the whole year. W. A. Cowles, Julv 7,1874, to close of year. F. A. Clark, July 11,1874, to close of year. F. O. Maxson, July 9,1874, to close of year. Louis Nell, the whole year. Wm. H. Rowe, July 9,1874, to May 31,1875, E. J. Sommer, July 1,1874, toMay 9,1875. J. C. Spiller, July 11,1874, to close of year. Gilbert Thompson, the whole year. Geo. H. Birnie, May 15, 1875, to close ot year. John A. Hasson, May 22,1875, to close of year. BAROMETRIC RECORDERS. Bernard Gilpin, July 1, 1874, to Dec. 15, 1874. F. M. Lee, the whole year. Geo. M. Dunn, May 5,1875, to close of year. F. Brockdorff, May 15, 1875, to close of Win. C. Niblack, May 20, 1875, to close of year. Frank Holland, June 1, 1875, to close of year. Allston C. Ladd, May 22, 1875, to close of year. , year. GEOLOGISTS. G. K. Gilbert, July I, 1874, to Sept. 30, I Jules Marcou, April 1, 1875, to close of 1874. year. A. R. Conkling, May 1^, 1875, to close of | Douglas A. Joy, during month of June, year. 1875. PALEONTOLOGISTS. Prof. E. 1). Cope, July 7, 1874, to close of j Dr. C. A. White, July 18, 1874, to May 25? year. | 1875. MINERALOGIST AND CHEMIST. Dr. Oscar Loew, the whole year. COLLECTORS IN ZOOLOGY. Chas. E. Aiken, July 22, to October 19,1874. H. W. Henshaw> ( ornithologist,) the whole year. W. G. Shedd, July 23 to Nov. 13,1874. Chas. T. Shoemaker, May 25, 1875, to end of year. PIIOTOGRArnER. T. II. O'Snllivan, July 23, to Nov. 30, 1874. |