Draining for Profit: And Draining for HealthOrange Judd Company, 1890 - 252 páginas |
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Página 46
... economical plan for draining any ordinary agricultural land , to stake the lines , and to determine the grade of the drains , and the sizes of tile with which they should be furnished . 45 66 66 * 66 * On this subject Mr. 46.
... economical plan for draining any ordinary agricultural land , to stake the lines , and to determine the grade of the drains , and the sizes of tile with which they should be furnished . 45 66 66 * 66 * On this subject Mr. 46.
Página 49
... stake off the field into squares of 50 feet , by first running a base line through the center of the greatest length of the field , marking it with stakes at intervals of 50 feet , then stake other lines , also at intervals of 50 feet ...
... stake off the field into squares of 50 feet , by first running a base line through the center of the greatest length of the field , marking it with stakes at intervals of 50 feet , then stake other lines , also at intervals of 50 feet ...
Página 52
... stake , and , as the height of the instrument Fig . 6. - LEVELLING INSTRUMENT . * above the imaginary plane has been reached , by subtract- ing one elevation from the other , the operator determines the height of the ground at that stake ...
... stake , and , as the height of the instrument Fig . 6. - LEVELLING INSTRUMENT . * above the imaginary plane has been reached , by subtract- ing one elevation from the other , the operator determines the height of the ground at that stake ...
Página 53
... stakes from the southern boundary to be 1.9 , 3.3 , and 5.1 . The contour lines , representing points of elevation of 2 , 3 , 4 , and 5 feet above the datum line , will cross the 50 - foot lines at their intersections , only where these ...
... stakes from the southern boundary to be 1.9 , 3.3 , and 5.1 . The contour lines , representing points of elevation of 2 , 3 , 4 , and 5 feet above the datum line , will cross the 50 - foot lines at their intersections , only where these ...
Página 55
... stakes , we can denote on the map the shape and depth of sunken rocks . The shaded spot on the east side of the map , ( Fig . 8 , ) indicates a rock three feet from the surface , which will be assumed to have been explored by sounding ...
... stakes , we can denote on the map the shape and depth of sunken rocks . The shaded spot on the east side of the map , ( Fig . 8 , ) indicates a rock three feet from the surface , which will be assumed to have been explored by sounding ...
Otras ediciones - Ver todas
Draining for Profit, and Draining for Health George E 1833-1898 Waring Sin vista previa disponible - 2015 |
Términos y frases comunes
acre agricultural allow basin bottom brick bushels carried cause cents clay collars commenced condition connection considerable contour lines cost course covered crop cultivation deposit depth discharge diseases distance ditch drainage dyke earth effect Ensilage evaporation fall Farm farmer feet deep fever field fifth column filled flow foot four feet Gisborne grade ground Hackensack River heat heavy rain houses improvement inches joints kiln labor laid land lateral drains laying length less lower main drain malarious manure marsh matters moisture muddy water nearly necessary obstruction operation outlet particles pipes placed plants plow porous practice prevent quantity rain-fall removed result retentive roots salt marsh saturated season sewage sewers shown in Fig side silt silt-basin slope soakage soil spring stakes steepest descent stone subsoil sufficient surface tide tile tile-draining tion typhoid fever undrained upper end whole width