 ... station mark, (6) a copper bolt projecting slightly above the concrete, (c) an iron nail with the point projecting above the concrete, (d) a glass bottle with the neck projecting a little above the concrete, (e) an earthenware jug with the mouth projecting...  Special Publications - Página 1071935Visualização integral - Acerca deste livro
 | U.S. Coast and Geodetic Survey - 1921 - 232 páginas
...concrete 3 feet below the ground containing at the center of its upper surface (a) n standard disk station mark, (6) a copper bolt projecting slightly...concrete, (c) an iron nail with the point projecting abbve the concrete, (d) a glass bottle with the neck projecting a little above the concrete, (e) an... | |
 | 1926 - 344 páginas
...concrete 3 feet below the ground containing at the center of its upper surface (a) a standard disk station mark, (6) a copper bolt projecting slightly...the mouth projecting a little above the concrete. PART I. FIELD METHODS bolt set In cement in a drill hole or depression, (d) an iron spike set point... | |
 | C. F. Maynard, J. A. Bond - 1927 - 538 páginas
...concrete 3 feet below the ground containing at the center of its upper surface (a.) a standard disk station mark, (6) a copper bolt projecting slightly...concrete. Note 8. — In bedrock, (a) a standard disk station mark wedged in a drill hole, (b) a standard disk station mark set in concrete in a depression,... | |
 | Russell Charles Brinker, Roy Minnick - 1995 - 1010 páginas
...ground containing at the center of its upper surface (a) a standard triangulation-station disk, (b) a copper bolt projecting slightly above the concrete,...above the concrete. Note 8. In bedrock, (a) a standard triangulation-station disk cemented in a drill hole, (b) a standard triangulation-station disk set... | |
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