 | Meteorology - 1723 - 1336 pages
...with the neighbouring Sand, which covers, and has infinuated itfelf among it : After which they dig up Earth for Ufe, to the Depth of about eight Feet more, the Matter whereof is diftinguim'd into feveral Layers, there being comr monly about a Foot and an half between one horizontal... | |
 | Royal Society (Great Britain) - Mathematics - 1734 - 462 pages
...with the neighbouring Sand, which covers, and has infinuated itfelf among it: After which they dig up Earth for Ufe, to the Depth of about eight Feet more, the Matter whereof is diftinguimed into feveral Layers, there being commonly about a Foot and an half between one horizontal... | |
 | William Daniel Conybeare, William Phillips - Geology - 1822 - 592 pages
...neighbouring sand, which covers, and has insinuated itself among if, afterwards they dig up the earth for use to the depth of about eight feet more, the matter whereof is distinguished into several layers, there being commonly a foot and a half between one horizontal fissure... | |
 | William Daniel Conybeare, William Phillips - Geology - 1822 - 568 pages
...neighbouring sand, which covers, and has insinuated itself among it ; afterwards they dig up the earth for use to the depth of about eight feet more, the matter whereof is distinguished into several layers, there being commonly a foot and a half between one horizontal fissure... | |
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... earth ; the upper layer of which, being about a foot deep, they call the cledge; and this is by the diggers thrown by as useless, by reason of its too great mixture with the neighbouring sand, which covers, and has insinuated itself among... 