Bulletin 565; Results of Spirit Leveling in Colorado, 1896 to 1914, Inclusive

Sprache: Englisch

Verlag: Government Printing Office, Washington, D.C., 1915

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Artikelbeschreibung des Verkäufers

Ex-library. Original publisher's maroon cloth binding with gilt lettering on spine (including number "565"). At least two tipped-in Errata (each is a typed leaf) included. 6" x 9 1/4." 192 pages, complete. One black-and-white plate, complete. Index in back. Pages are virtually pristine and intact except for black ink library stamp on front pastedown, black ink signature of "H. H. Hodgeson" on a front flyleaf, and a small dampstain limited to fore-edge of text block. Covers are very clean and intact except for moderate wear to extremities, a few tiny glue stains and other marks, and possible glue application or repair on spine. A Very Good copy. This is Bulletin 565, a report by the United States Department of the Interior and U.S. Geological Survey (USGS) about "spirit leveling" in Colorado from 1896-1914, inclusive. The Introduction clarifies that Bulletin 486 contains earlier information about Colorado benchmarks from 1896-1910 and that this publication, Bulletin 565, picks up from where Bulletin 486 left off. Bulletin 565 contains the results of Bulletin 486, but with corrections that match said results with a 1912 adjustment, as well as spirit leveling results from USGS since 1910 (the last year covered by Bulletin 486). The benchmarks used in Colorado spirit leveling are briefly described as having two forms, a circular bronze or aluminum tablet cemented in a drill hole in the rock wall of a public buildings, bridge abutment, or other architectural structure or, in the absence of rock or architecture, a wrought-iron post set into the ground. The numbers stamped on the benchmarks show the "elevations to the nearest foot as determined by the levelman." The Introduction also explains the differences between primary and precise leveling. The Table of Contents shows that some areas of Colorado were measured using primary leveling while others used precise leveling. The report is principally a list of "primary leveling" and "precise leveling" benchmarks with about a line or two per entry describing where that benchmark is located in Colorado. The list is alphabetical by location (town, landmark, and the like) within a specific quadrangle or region. Example entry under "Precise Leveling": "Platte Canyon Quadrangle. [Region] From Platte Canyon along Colorado & Southern Ry. to Bailey. [Constituent location] Platte Canyon, 2.10 miles south of, 210 feet north of head gate in Platte River, 5 feet west of track, on top of large bowlder [sic]; square marked 'U. S. 5592 B. M.'; Feet: 5,591.752." Example entry under "Primary Leveling": "Boulder Quadrangle. [Region] From Chipmunk Gulch along road north to St. Vrain Creek, thence along creek road to Lyons. [Constituent location] Ward, 1 mile north of, 200 feet south of San Blas mill, in top of rock, east side of road; bronze tablet stamped '8901 Denv'; Feet: 8,899.089." Appendix A ("Elevations adjusted by the United States Coast and Geodetic Survey from precise leveling") and Appendix B ("Secondary elevations") are in the back.…

Bestandsnummer des Verkäufers 027138

Bibliografische Details

Titel
Bulletin 565; Results of Spirit Leveling in Colorado, 1896 to 1914, Inclusive
Autor
Department of the Interior; United States Geological Survey; Marshall, R. B. (Chief Geographer)
Verlag
Government Printing Office, Washington, D.C.
Erscheinungsjahr
1915
Zustand
Very Good
Einband
Hardcover
Sprache
Englisch
Verkäuferkataloge
Science and Technology, U.S. History, Western Americana

Barry Cassidy Rare Books

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