. Report of the Boundary commission upon the survey and re-marking of the boundary between the United States and Mexico west of the Rio Grande, 1891-1896 ... 28Aug I St 10 22 ; 12; 20 Sipt 11 34 Oit 1 , 18 Oct 4| 21 57. Feb 16I Sept 27 Sppt 30 I .14 i. UNITED STATES AND MEXICAN BOUNDARY. 10!) The mean value of tlie residuals, or differences between the result for the niyht and the meanfor the station, is On 31 nights, out of a total of CS, the residual was not greater than thepro
. Report of the Boundary commission upon the survey and re-marking of the boundary between the United States and Mexico west of the Rio Grande, 1891-1896 ... 28Aug I St 10 22 ; 12; 20 Sipt 11 34 Oit 1 , 18 Oct 4| 21 57. Feb 16I Sept 27 Sppt 30 I .14 i. UNITED STATES AND MEXICAN BOUNDARY. 10!) The mean value of tlie residuals, or differences between the result for the niyht and the meanfor the station, is On 31 nights, out of a total of CS, the residual was not greater than theprobable error in the result arising from observatiou only. TBI ANGULATION. The triangulatiou near El Paso was intended merely to connect Astronomical Station No. 1with Emory Monuments No. 1, No. 2, and No. 3, but was extended to couuect with j)rominentbuildings in El Paso and Juarez, and with the triangulation of the Coast and Geodetic Surveylongitude party at K\ Paso in 1892. The measurements of base and angles were made conjointlyby the tangent party under Mr. E. L. Ingram, assistant engineer, and the astronomical party. A base feet long w as measured with 20 m. and 50 m. steel tapes on the railroad track nearthe astrononncal station. During the measurement the tape was placed upon the rail and wastherefore supported throughout its whole length. T
Size: 2011px × 1243px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, bookpublisherwashingtongovtprin
