 | Henry Thomas De La Beche - 1833 - 656 pages
...gravel or coarse sand, which will rub off this very thin crust, and allow another layer to be worn off. A velocity of six inches will lift fine sand; eight...linseed ; twelve inches will sweep away fine gravel j twenty-four inches will roll along rounded pebbles an inch in diameter ; and it requires three feet... | |
 | John M. Moffatt - 1835 - 854 pages
...state, and tear it up ; a velocity of six inches will lift fine sand, that of eight inches will rai« sand as coarse as linseed, twelve inches will sweep...rounded pebbles an inch in diameter; and it requires a velocity of three feet per second to sweep alon; shivery angular stones of the size of an egg. Whatever... | |
 | 1839
...work upon fine clay, fit for pottery ; and, however firm and compact it may be, it will tear it up. A velocity of six inches will lift fine sand ; eight...as coarse as linseed; twelve inches will sweep away tine gravel ; twenty-four inches will roll along rounded pebbles an inch in diameter ; and it requires... | |
 | Olinthus Gilbert Gregory - 1848 - 572 pages
...gravel or coarse sand, which will rub off this very thin crust, and allow another layer to be worn off; a velocity of six inches will lift fine sand ; eight...sand as coarse as linseed ; twelve inches will sweep along fine gravel ; twenty-four inches will roll along rounded pebbles an inch diameter; and it requires... | |
 | 1862 - 628 pages
...or coarse sand, " which will rub off this very thin crust, and allow another layer to " be worn off. A velocity of six inches will lift fine sand, eight...sand as coarse as linseed, twelve inches will sweep " along fine gravel, twenty-four inches will roll along rounded Deb-' " bles an inch diameter, and... | |
 | Olinthus Gregory - 1863 - 482 pages
...34-172 92 73-788 82-894 44 31-742 37-871 96 77-370 86-685 48 35-151 41-570 100 8190-5 52 38-564 45-282 velocity of six inches will lift fine sand ; eight...sand as coarse as linseed ; twelve inches will sweep along fine gravel ; twenty-four inches will roll along rounded pebbles an inch in diameter ; and it... | |
 | S.H.Sweet - 1863 - 408 pages
...off this very thin crust, and allow another layer to be worn qff. A velocity of six inches per second will lift fine sand ; eight inches will lift sand as coarse as linseed; twelve inches will sweep along fine gravel; twenty -four inches will roll along round pebbles an inch in diameter; and it requires... | |
 | Sir John Lubbock - 1865 - 560 pages
...gravel or coarse sand, which will rub off this very thin crust, and allow another layer to be worn off. A velocity of six inches will lift fine sand, eight...sand as coarse as linseed, twelve inches will sweep along fine gravel, twentyfour inches will roll along rounded pebbles an inch diameter, and it requires... | |
 | 1874 - 1186 pages
...gravel or coarse sand, which will rub off this very thin crust, and allow another layer to be worn off A velocity of six inches will lift fine sand ; eight inches will lift saud as coarse as linseed ; twelve inches will sweep along fine gravel ; twenty-four inches will roll... | |
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A velocity of six inches will lift fine sand, eight inches will lift sand as coarse as linseed, twelve inches will sweep along fine gravel, twentyfour inches will roll along rounded pebbles an inch diameter, and it requires three feet per second at the... 