Results of Spirit Leveling in New York, 1906-1911, Inclusive |
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Common terms and phrases
50 feet abutment of bridge Alaska aluminum tablet stamped base of telephone bowlder bridge seat bronze tablet stamped chiseled square copper bolt P. R. R. copper nail Copper River corner fence corner of crossroads Corps of Engineers Creek culvert east end east side Engineers p. b. m. feet east feet north feet south feet west fence post Fortymile River front of station gold gravels highway inches iron post stamped Lake milepost miles east miles north miles northwest miles south Mount Marcy Mountain nail in root north end north of station north side northeast OHIO Pennsylvania Railroad placer Porcupine River QUADRANGLE quartz Railroad bench mark railroad bridge road crossing rock side of road south end southeast southwest corner spike in base square cut telephone pole top of rail top of west towpath abutment triangulation station Turnagain Arm U. S. Corps Valley vein water surface west of station west wing wing wall
Popular passages
Page 238 - Second-feet per square mile" is the average number of cubic feet of water flowing per second from each square mile of area drained, on the assumption that the run-off is distributed uniformly both as regards time and area. "Run-off in inches...
Page 1 - I). The numbers stamped on the bench marks described in the following pages represent the elevations to the nearest foot, as determined by the levelman. These numbers are stamped with T^g-inch steel dies on the tablets or post caps, to the left of the word "feet.
Page 4 - Mean sea level is the average height of the water, all stages of the tide being considered. It is determined from observations made by means of tidal gages placed at stations where local conditions, such as long narrow bays, rivers, and like features will not affect the height of the water. To obtain even approximately correct results these observations must extend over at least one lunar month, and if accuracy is desired they must extend over several years. At ocean stations the halftide level and...
Page 8 - on tablets or posts. For such areas corrections for published results will be made from time to time as the precise-level lines of the United States Geological Survey or other Government organizations are extended.
Page 2 - ... lowest tides, nor is it the half sum of the mean of all the high tides and the mean of all the low tides, which is called the half-tide level. Mean sea level is the average height of the water, all stages of the tide being considered. It is determined from observations made by means of tidal gages placed at stations where local conditions, such as long, narrow bays, rivers, and like features, will not affect the height of the water.
Page 3 - The office adjustment of the notes and the reduction to mean sealevel datum may so change some of the figures that the original markings are 1 or 2 feet in error. It is assumed that engineers and others who have occasion to use the bench-mark elevations will apply to the Director of the United States Geological Survey...
Page 2 - J inch thick, having a 3-inch stem, which is cemented in a drill hole in solid rock in the wall of some public building, a bridge .abutment, or other substantial masonry structure.
Page 7 - The names of the various levelmen are given in the introduction to each list. The office work of computation, adjustment, and preparation of lists was done mainly by SS Gannett, geographer, and D.
Page 7 - Bench marks. — The standard bench marks are of two forms. The first form is a circular bronze or aluminum tablet ( C and E, PI.
Page 351 - Bulletin 328, 1908, 343 pp. •Investigation of the mineral deposits of Seward Peninsula, by PS Smith. In Bulletin 345, 1908, pp. 206-250. 45 cents. Geology of the Seward Peninsula tin deposits, by Adolph Knopf. Bulletin 358, 1908, 72 pp.