Geodesy : the eastern oblique arc of the United States and osculating spheroid / by ChasASchott . tory one, .since no further labor was needed tobring about a closer accord. * It is made up of the several parts as follows: In base net, 42 kilometers; first section, 98 kilometers; second section,88 kilometers; third section, 80 kilometers; fourth section, 209 kilometers; and fifth section, 160 and a half units in the seventh place of decimals in the logarithm. THE MAIN TRIANGULATION. 219 12. THE FIRST SECTION OF THE TRIANGULATION WEST OF THE DAUPHIN ISLANDBASE NET, ALABAMA AND M
Geodesy : the eastern oblique arc of the United States and osculating spheroid / by ChasASchott . tory one, .since no further labor was needed tobring about a closer accord. * It is made up of the several parts as follows: In base net, 42 kilometers; first section, 98 kilometers; second section,88 kilometers; third section, 80 kilometers; fourth section, 209 kilometers; and fifth section, 160 and a half units in the seventh place of decimals in the logarithm. THE MAIN TRIANGULATION. 219 12. THE FIRST SECTION OF THE TRIANGULATION WEST OF THE DAUPHIN ISLANDBASE NET, ALABAMA AND MISSISSIPPI, 1846-1855. Proceeding from the base net westward, the triangulation is contracted in dimen-sions and possesses an inferior degree of accuracy as compared with the triangulationnorth of the base. This change is primarily due t<j unfavorable atmospheric conditionsand to tlie difBculty of preserving the stations for a few years in a lo\v country, subjectto storms and severe hurricanes, which cause alterations in the shore line, overflow of No. 33. Deer Jalaruil STiip laXojrvdL1855. Faint aitx JPirta Horn, Island. East2655 Kilometers cLVLpnin. lalcLTvfi, ScLse Petit Bcis 10 10 20 30Statute Miles itO 50 60 70 10 10 20 30 <tO the ground, and destruction of the stations. When the localities were revisited inanother year several of the stations could not be recovered, and new stations had to beestablished in their places. The width of the triangulation was limited by the widthof Mississippi Sound, along which it extends. The observers were Assistants F. and J. E. Hilgard. In 1S54-55 a Gambey repeating theodolite was used, andfor measures the resulting seconds are given to the nearest tenth. The .sectionextends from the Dauphin Island base net to the line Deer Lsland i to Ship Island 1855,a distance of about 56 kilometers or 35 statute miles. The connected series of quadri-laterals terminates here. Abstracts of horizontal directions at stations of
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherwashi, bookyear1902
