 ... this can feldom be done, without throwing up the land in high ridges, with deep drains between them. A main carriage being then taken out of the river at a higher level, fo as to command the tops of thefe ridges, the water is carried by fmall trenches...  A Practical Treatise on Draining Bogs and Swampy Grounds - 144 ページJames Anderson 著 - 1801 - 308 ページ全文表示 - この書籍について
 | The Bath and West of England Society - 1795 - 444 ページ
...to be confidered is, how the water is to be got off when once brought ori; and in fuch fituatioris this can feldom be done, without throwing up the land in high ridges, with deep drains between them. A main carriage being then taken out of the river at a higher level, fo as to command the tops of thefe... | |
 | 1795 - 508 ページ
...object to be confidered ja, how the water is to be got off when once brought on; and, in fujh fixations, this can feldom be done without throwing up the land in high ridges, with deep drains between them* A main carriage being then taken VOL. IU. H out out of the river at a higher level, fo as to command... | |
 | William Tatham - 1801 - 474 ページ
...confidered is, how the water is to be got off when once brought on ; and in fuch filiations this can leldom be done without throwing up the land in high ridges,..."higher level, fo as to command the tops of thefe ridges, the water is carried by fmall trenches or carriages along the top of each ridge, and by means... | |
 | William Humphrey Marshall - 1817 - 750 ページ
...if, how the water is to be got off" when onoe brought on ; and , in such situations this ran seldom be done, without throwing up the land in high ridges, with deep drains between them. A main carriage being then taken out of the river at a higher level, so as to command the tops of these... | |
 | George Sinclair - 1826 - 596 ページ
...the difficulty that sometimes occurs in getting a command of the water. This is generally effected by throwing up the land in high ridges, with deep drains between them. A main carriage is then taken out of the river, at a level sufficiently high to command the tops of the... | |
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