Draining for Profit, and Draining for HealthOrange Judd Company, 1867 - 238 páginas |
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Página 14
... better condition . 66 66 " We pass on now to Fig . 3. Here we find a different 66 state of matters . The canals are open and freely sup- " plied with air , while the pores are filled with water ; and , consequently , you perceive 66 66 ...
... better condition . 66 66 " We pass on now to Fig . 3. Here we find a different 66 state of matters . The canals are open and freely sup- " plied with air , while the pores are filled with water ; and , consequently , you perceive 66 66 ...
Página 16
... better that , in commencing this improvement , a single field be really well drained , than that the whole farm be half drained . Of course , there are some farms which suffer from too much water , which are not worth draining at ...
... better that , in commencing this improvement , a single field be really well drained , than that the whole farm be half drained . Of course , there are some farms which suffer from too much water , which are not worth draining at ...
Página 25
... better channel for the water of future rains , so that , in time , the heaviest clays , which will drain but imperfectly during the first one or two years , will pass water , to a depth of four or five feet , almost as readily as the ...
... better channel for the water of future rains , so that , in time , the heaviest clays , which will drain but imperfectly during the first one or two years , will pass water , to a depth of four or five feet , almost as readily as the ...
Página 29
... better year " by year ; the water gets a habit of coming to them ' - a very correct statement of fact , though not a very philosophical " explanation . " 66 66 66 Alderman Mechi , of Tiptree Hall , says : " Filtration " may be too ...
... better year " by year ; the water gets a habit of coming to them ' - a very correct statement of fact , though not a very philosophical " explanation . " 66 66 66 Alderman Mechi , of Tiptree Hall , says : " Filtration " may be too ...
Página 37
... better fitting it for the support of vegetation ; and the earlier thawing makes it earlier ready for spring work . Drought . At first thought , it is not unnatural to sup- pose that draining will increase the ill effect of too dry ...
... better fitting it for the support of vegetation ; and the earlier thawing makes it earlier ready for spring work . Drought . At first thought , it is not unnatural to sup- pose that draining will increase the ill effect of too dry ...
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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 Central Park CHAPTER clay Clinometer 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 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 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.