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A Philadelphia rod is a level staff used in surveying. The rod is used in levelling procedures to determine elevations and is read using a level. A Philadelphia rod consists of two sliding sections graduated in hundredths of a foot. On the front of the rod the graduation increasing from zero at the bottom.
The water level at each end of the tube will be at the same elevation, whether the two ends are adjacent or far apart, so a line between them will be horizontal at its midpoint and a shed base, building foundation or similar structure laid out using several such lines will be "horizontal" within building tolerances on any scale over which use ...
HABS—Historic American Buildings Survey projects in Philadelphia. Pages in category "Historic American Buildings Survey in Philadelphia" The following 197 pages are in this category, out of 197 total.
For example, gravity is 0.1% stronger in the northern United States than in the southern, so a level surface that has an orthometric height of 1000 meters in one place will be 1001 meters high in other places. In fact, dynamic height is the most appropriate height measure when working with the level of water over a large geographic area. [4]
Notable buildings in Philadelphia's East Center City Commercial Historic District include the Curtis Publishing Co. (1907), Lits Department Store (1891), Strawbridge and Clothier (1868), Gimbels (1894), Benjamin Franklin Hotel (1922), New York Mutual Life Insurance Company Building (1872, 1890), Aldelphia Hotel (1912), Blum Store (1927 ...
Boathouse Row is a historic site which is located in Philadelphia, Pennsylvania, on the east bank of the Schuylkill River just north of the Fairmount Water Works and the Philadelphia Museum of Art. It consists of a row of fifteen boathouses housing social and rowing clubs and their racing shells .
Also in the district are eleven 2 + 1 ⁄ 2-story brick rowhouses, with the earliest dated to the 1830s. Notable buildings include the Rebman Building (1903), Stewart Cracker Building (c. 1900), U.S. Tire Company Building (1911), Lasher Building (1927), Philadelphia City Morgue (1928), and Overland Motor Company Building (1910, c. 1940).
The reference water levels are used on inland waterways to define a range of water levels allowing the full use of the waterway for navigation. [1] Ship passage can be limited by the water levels that are too low, when the fairway might become too shallow for large ("target", "design") ships, or too high, when it might become impossible for the target ships to pass under the bridges. [1]