 Note 13. — A standard disk reference mark with the arrow pointing toward the station set in concrete at the center of the top of a tile, (a) which is embedded in the ground, (b) which is surrounded by a mass of concrete, (c) which is fastened by means...  Special Publications - Página 1071935Visualização integral - Acerca deste livro
 | U.S. Coast and Geodetic Survey - 1921 - 232 páginas
...station set in concrete at the center of the top of a tile, (a) which is embedded in the ground, (b) which is surrounded by a mass of concrete, (c) which...upper end of a long wooden pile driven into the marsh, (t?) which is set in a block of concrete and projects from 12 to 20 inches above the block. 95. Witness... | |
 | 1926 - 344 páginas
...toward the station, set in concrete at the center of the top of a tile (a) which is embedded in the ground, (6) which is surrounded by a mass of concrete,...from 12 to 20 inches above the block. WITNESS MARKS by Note,' la Note,' 7a Note,' lla Note,' lla Note,' Note,* ark meters, n mark meters. STATE: visoonsln... | |
 | C. F. Maynard, J. A. Bond - 1927 - 538 páginas
...station set in concrete at the center of the top of a tile, (a) which is embedded in the ground, (b) which is surrounded by a mass of concrete, (c) which...to 20 inches above the block. Witness marks. Note 14. — A conical mound of earth surrounded by a circular trench. Note 15. — A tree or stump marked... | |
 | Russell Charles Brinker, Roy Minnick - 1995 - 1010 páginas
...of a tile (a) that is embedded in the ground, (b) that is surrounded by a mass of concrete, (c) that is fastened by means of concrete to the upper end of a long wooden pile driven into the marsh, (d) that is set in a block of concrete and projects from 12 to 20 in. above the block. Underground marks... | |
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