Draining for Profit, and Draining for HealthOrange Judd Company, 1867 - 238 páginas |
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Página 7
... four feet of the surface of the ground , except during and immediately after heavy rains , require draining . Of course , the particles of the soil cannot be made dry , nor should they be ; but , although they should be moist themselves ...
... four feet of the surface of the ground , except during and immediately after heavy rains , require draining . Of course , the particles of the soil cannot be made dry , nor should they be ; but , although they should be moist themselves ...
Página 9
... four feet in the earth , may collect water at its bottom , shortly after a rain ; this is a sure sign of the need of draining . All tests of the condition of land as to water , -such as trial pits , etc. , should be made , when ...
... four feet in the earth , may collect water at its bottom , shortly after a rain ; this is a sure sign of the need of draining . All tests of the condition of land as to water , -such as trial pits , etc. , should be made , when ...
Página 10
... four feet of the soil , and be removed from below . Every drop of it is freighted with fertilizing matters washed out from the air , and in its de- scent through the ground , these are given up for the use of plants ; and it performs ...
... four feet of the soil , and be removed from below . Every drop of it is freighted with fertilizing matters washed out from the air , and in its de- scent through the ground , these are given up for the use of plants ; and it performs ...
Página 15
... four feet , or even more , should be main tained , as nearly as possible , in the condition represented in Fig . 3 , —that is , the particles of soil should hold water by attraction , ( absorption , ) and the spaces between the ...
... four feet , or even more , should be main tained , as nearly as possible , in the condition represented in Fig . 3 , —that is , the particles of soil should hold water by attraction , ( absorption , ) and the spaces between the ...
Página 23
... four inches of drained soil contains free space enough to receive a rain - fall one inch in depth , and , by the same token , four feet of drained soil can receive twelve inches of rain , - more than is known to have ever fallen in ...
... four inches of drained soil contains free space enough to receive a rain - fall one inch in depth , and , by the same token , four feet of drained soil can receive twelve inches of rain , - more than is known to have ever fallen in ...
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 amount basin bottom brick bushels carried cause cent CHAPTER clay collars commence condition connection considerable contour lines cost course covered crop cultivation deposit depth discharge diseases distance ditch drainage dyke earth effect 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 inclination joints kiln labor laid land laying length less lower main drain malarious manure marsh matters measure moisture muddy water nearly necessary obstruction operation ORANGE JUDD outlet particles pipes placed plants plowing porous practice prevent proper quantity rain-fall removed result roots salt marsh saturated season sewage sewers shown in Fig side silt silt-basin slope soakage spring stakes steepest descent stone subsoil sufficient tide tile drain tion typhoid fever under-draining undrained vegetable whole width
Pasajes populares
Página 80 - ... part.* When the Regent's Park was first drained large conduits were in fashion, and they were made circular by placing one horseshoe tile upon another. It would be difficult to invent a weaker conduit. On re-drainage innumerable instances were found in which the upper tile was broken through the crown, and had dropped into the lower. Next came the...
Página 221 - Excess of moisture, even on lands not evidently wet, is a cause of fogs and damps. " 2. Dampness serves as a medium for the conveyance of any decomposing matter that may be evolved, and adds to the injurious effects of such matters in the air; in other words, the excess of moisture may be said to increase or aggravate atmospheric impurities. " 3. The evaporation of the surplus moisture lowers the temperature, produces chills, and creates or aggravates the sudden and injurious changes or fluctuations...
Página 68 - A farmer manures a field of four or five inches of free soil reposing on a retentive clay, and sows it with wheat. It comes up, and between the kernel and the manure it looks well for a time, but anon it sickens. An Irish child looks well for five or six years, but after that time potato-feeding, and filth, and hardship, begin to tell.
Página 79 - ... material, even when the drain is completed, offers an imperfect resistance, but the constant pressure together of the sides, even when it does not produce a fracture of the soil, catches hold of the feet of the tile and breaks it through the crown. Consider the case of a drain formed...
Página 67 - ... against evaporation; and we are inclined to believe that any prejudicial combined action of attraction and evaporation is thereby well guarded against. The facts stated seem to prove that less will not suffice. So much on the score of temperature, but this is not all. Do the roots of esculents wish to penetrate into the earth — at least, to the depth of some feet? We believe that they do.
Página 167 - ... if it does come, then draining will pay for itself speedily. For instance, Mr. Johnson had a lot of thirteen acres on the shore of the lake, where the bank at the foot of the lot was perpendicular to the depth of thirty or forty feet. He supposed from this fact, and because the surface seemed very dry, that he had no need to drain it. But somehow he lost his...
Página 166 - ... clay tiles were buried in the ground. But this increase of crop is not the only profit of drainage ; for Mr. Johnston says that on drained land one half the usual quantity of manure suffices to give maximum crops. It is not difficult to find a reason for this. When the soil is sodden with water, air...
Página 225 - In the system now adopted, it has been sought to remove these evils by the construction of new lines of sewers, laid at right angles to the existing sewers, and a little below their levels, so as to intercept their contents, and convey them to an outfall 14 miles below London Bridge.