The Rampart Gold Placer Region, AlaskaU.S. Government Printing Office, 1906 - 54 Seiten |
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Alaska ALBANY aluminum tablet stamped Beaver Creek bed rock bronze tablet stamped chert chisel mark chiseled square Church coping stone copper bolt stamped corner of Bridge culvert Delaware and Hudson Devonian DUNKIRK east abutment east end east rail end of east end of south Erie Railroad Erie station feet east feet north feet south feet west figures of elevation foundation wall front of Erie front of station geology gold gravels highway bridge Lake Lehigh Valley Railroad levelman limestones miles east miles north miles south miles west Minook Creek north abutment north end north rail northeast Northern Central Railway northwest corner OSWEGO precise leveling QUADRANGLE quartzite railroad bridge Rampart region ridge River road crossing schists slates south abutment south end south of station south rail southeast corner southwest stream THENCE top of east top of north top of rail topographer tributaries water table west end west side White Mountains Yukon
Beliebte Passagen
Seite 42 - Reconnaissances in the Cape Nome and Norton Bay regions, Alaska, in 1900,
Seite vii - SCHRADER, FC, and SPENCER, AC The geology and mineral resources of a portion of the Copper River district, Alaska.
Seite i - Nature and origin of deposits of phosphate of lime, by RAF Penrose, jr., with introduction by NS Shaler. 1888. 143 pp. (Out of stock.) B 65. Stratigraphy of the bituminous coal field of Pennsylvania, Ohio, and West Virginia, by IC White. 1891. 212 pp., 11 pis. (Out of stock.) Bill.
Seite 8 - ... number at the same time gives an approximate statement of the elevation. It is assumed that engineers and others finding these bench marks so stamped in the field will communicate with the director of the United States Geological Survey in order to obtain the accepted elevation to hundredths or thousandths of a foot.
Seite 7 - The elevations are arranged according to the degree of accuracy of their determination, precise and primary. The former are determined by lines of levels run either in both forward and backward directions or by simultaneous double-rodded lines, a high-grade instrument being used and special precantions being taken in observations and reductions to correct errors and make the line continuously good throughout.
Seite vii - FC A reconnaissance of a part of Prince William Sound and the Copper River district, Alaska, in 1898. In Twentieth Ann. Rept., pt.
Seite 8 - They have been subjected to change resulting from the adjustments necessary to close circuits and to those resulting from reduction to mean sea level through readjustment of the precise-level net of the United States.