 | Amory Prescott Folwell - 1899 - 614 páginas
...entirely free from fine material. . . . The filter-sand shall be clean river, beach, or bank sand, with either sharp or rounded grains. It shall be entirely...shall be of the following diameters: Not more than \%, by weight, less than 0.13 mm., nor more than 10$ less than 0.27 mm., at least ic% by weight, shall... | |
 | Amory Prescott Folwell - 1899 - 612 páginas
...entirely free from fine material. . . . The filter-sand shall be clean river, beach, or bank sand, with either sharp or rounded grains. It shall be entirely...shall be of the following diameters: Not more than \%, by weight, less than 0.13 mm., nor more than io# less than 0.27 mm., at least \o%, by weight, shall... | |
 | Allen Hazen - 1900 - 386 páginas
...the bank-sand would have been. The specifications of the filter-sand require that " The filtersand shall be clean river-, beach-, or bank-sand, with...materials from it. The grains shall, all of them, be of MECHANICAL COMPOSITION OF FILTER SAND AND GRAVELS. (ARROWS SHOW REQUIREKENT OF SPECIFICATIOH) M6 BO9... | |
 | Frederick Eugene Turneaure - 1901 - 786 páginas
...Soc. C. E , engineer, were as follows : "The filter sand shall be clean river, beach, or bank sand, with either sharp or rounded grains. It shall be entirely...shall be of the following diameters: Not more than i per cent by weight less than o. 13 mm., nor more than 10 per cent less than 0.27 mm. ; at least 10... | |
 | John Butler Johnson - 1902 - 600 páginas
...underdrains. Filter-Sand in Place. The filter-sand shall be Quality. clean, river, beach or bank sand, with either sharp or -rounded grains. It shall be...be of the following diameters : — Not more than one per cent., by weight, less than 0.13 of a millimeter nor more than ten per cent., less than 0.2?... | |
 | United States. Congress. Senate. Committee on the District of Columbia - 1903 - 388 páginas
...IN PLACE. (Item 21.) 274. Character. — The filter sand shall be clean river, beach, or bank sand, with either sharp or rounded grains. It shall be entirely...the following diameters: Not more than one-half of one per cent by weight shall be less than thirteen-hundredths of a millimeter; not more than seven... | |
 | John Butler Johnson - 1904 - 598 páginas
...underdrains. Filter-Sand in Place. The filter-sand shall be Quality, clean, river, beach or bank sand, with either sharp or rounded grains. It shall be entirely...be of the following diameters : — Not more than one per cent., by weight, less than 0.13 of a millimeter nor more than ten per cent., less than 0.27... | |
 | John Butler Johnson - 1904 - 596 páginas
...the underdrains. Filter-Sand in Place. The filter-sr.nd shall be clean, river, beach or bank sand, with either sharp or rounded grains. It shall be entirely...necessary, be washed to remove such materials from it Quality. The grains shall, all of them, be of hard material which will not disintegrate and shall be... | |
 | New York (N.Y.). Commission on Additional Water Supply - 1904 - 1120 páginas
...Filter Sand. Quality — Filter sand shall be of clean river, beach or bank sand (or crushed rock) with either sharp or rounded grains. • It shall be entirely free from clay and organic impurities, and shall, if necessary, be screened and washed to remove such materials. All... | |
 | Frederick Eugene Turneaure, Harry Luman Russell - 1908 - 854 páginas
...Am. Soc. CE, engineer, were as follows : " The filter sand shall be clean river, beach, or bank sand, with either sharp or rounded grains. It shall be entirely...shall be of the following diameters : Not more than i per cent by weight less than 0.13 mm., nor more than 10 per cent less than 0.27 mm.; at least 10... | |
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The filter sand shall be clean river, beach, or bank sand, with either sharp or rounded grains. It shall be entirely free from clay, dust, or organic impurities, and shall, if necessary, be washed to remove such materials from it. The grains shall all... 
