Encyclopaedia Britannica: Or, A Dictionary of Arts, Sciences, and Miscellaneous Literature, Enlarged and Improved, Volume 1A. Constable, 1823 |
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Pagina 367
... stratum of clay to the porous stra- tum containing the water . To drain an extensive bog , it will usually be necessary to dig a trench from end to end of it , with cross trenches at considerable distances , the bottom of the whole ...
... stratum of clay to the porous stra- tum containing the water . To drain an extensive bog , it will usually be necessary to dig a trench from end to end of it , with cross trenches at considerable distances , the bottom of the whole ...
Pagina 368
... stratum of gravel should be at a considerable depth beneath the surface of the earth , and as it may be sometimes even below the level of the place into which the drain must be emptied , it might sometimes be extremely difficult to make ...
... stratum of gravel should be at a considerable depth beneath the surface of the earth , and as it may be sometimes even below the level of the place into which the drain must be emptied , it might sometimes be extremely difficult to make ...
Pagina 369
... stratum of sand , or pebbles , through which the water passes ; and above those sands or pebbles another stratum of marl or clay , through the weakest parts of which the water , by a continual pressure from its fountain , forces a ...
... stratum of sand , or pebbles , through which the water passes ; and above those sands or pebbles another stratum of marl or clay , through the weakest parts of which the water , by a continual pressure from its fountain , forces a ...
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Encyclopaedia Britannica: Or, A Dictionary of Arts, Sciences, and ..., Volume 1 Volledige weergave - 1823 |
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Abuna Abyssinia academy according acre aerostatic Æsop æther Africa afterwards agriculture Ancient Geography antiquity appear army Axum balloon Begemder body BOTANY BOTANY Index called cattle church clay considerable corn crop cultivated curled death Dioclesian distance drain earth Egypt emperor empire equal Ethiopia Etna expence father feet Fezzan furrow Galla Gondar grass Greek ground height Herodotus honour horses Husbandry inches inhabitants kind king land lava length machine manner means Melcha ment mentioned miles moss motion Mount Etna mountain nature Negroes observed occasion Ozoro person plants plough Portuguese potatoes pozzolana present prince produce proper province quantity Ras Michael Red sea reign rendered river Roman roots says Scotland seed sent Sicily side situated Socinios soil sometimes soon sound spring stones stratum supposed surface tain thing Tigré tion town trees vegetables vibrations whole