. 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 ... 31 46 31 46 31 19 31 19 31 19 31 19 31 19 31 19 32 29 43 Mexican results. 31 40 47 31 40 ,. 40 - ■1 31 40 ± .00 31 19 * .19 31 19 ± .14 31 19 :: .05 31 19 ± .17 31 19 i .18 31 19 * .11 32 43 ± .26 32 32 * .19 31 40 31 40 31 46 31 46 31 40 31 19 31 19 31 19 31
. 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 ... 31 46 31 46 31 19 31 19 31 19 31 19 31 19 31 19 32 29 43 Mexican results. 31 40 47 31 40 ,. 40 - ■1 31 40 ± .00 31 19 * .19 31 19 ± .14 31 19 :: .05 31 19 ± .17 31 19 i .18 31 19 * .11 32 43 ± .26 32 32 * .19 31 40 31 40 31 46 31 46 31 40 31 19 31 19 31 19 31 19 31 19 31 19 31 19 31 19 31 19 32 32 Mexican observations made at Monument No. OS; Unit(^(l States observations made at Salazars old monument,no east side of San Pedro River, and reduced to Monument No. 98 by triangulation; hence Mexican result UNITED STATES AND MEXICAN BOUNDARY. SECTION y. lu order to identity the existing old momiineuts, as well as to obtain the necessary elementsfor locating tlie new monuments on the lines forming the boundary, the lollowing geodetic opera-tions were executed: I. Traciug the parallels according to tlie method of taugeuts and oflseta. II. Tracing- the meridian section by simple alignment, its direction having been previously verified. III. Tracing the azimuth lines, either by straight lines connecting consecutive existing old monuments directly,or by the aid of auxiliary lines starting at one of these monuments and passing as closely as possible to the nextmonument. IV. Triangulation made in the vicinity of the initial monument on the Rio Grande by the United States sectionto refer the initial mcpnumeut to its astronomical observatory, and the reference of the longitude of the initialmonument to the astronomical station at Juarez made by the Mexican section by flash signals at night. V. Tr
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