Rock is permeable by water to a greater extent than is generally supposed.
The UPPER ZONE OF FLOW extends from the ground-water surface downward through the waste mantle and any permeable rocks on which the mantle rests, as far as the first impermeable layer, where the descending movement of the water is stopped.
Excavations made in permeable rocks below the ground-water surface fill to its level and are known as wells.
In our study of underground water we learned that it is everywhere circulating through the permeablerocks of the crust, descending to profound depths under the action of gravity and again driven to the surface by hydrostatic pressure.
The theory of the semi-permeable membrane is discussed by M.
By means of two semi-permeable partitions acting oppositely with respect to two different gases A and B these gases could be mixed or separated by reversible methods.
This fine-to coarse-grained sandstone is very porous and permeable and is the most important single water-producing formation in the Panhandle-Plains area.
Aquifer--a water-bearing layer of porous and permeable rock.
The most solid ice is always permeable to water, and penetrated by innumerable fissures and capillary tubes, often extremely minute.
But nature has a cunning device for stopping such robbery, which is prevented by the membranes of root hairs being onlypermeable to the extent of letting water in, not permeable enough to allow sugar to escape.
These are the conditions of a true permeable stratum.
Every permeable stratum may yield water, and its ability to do this, and the quantity it can yield, depend upon its position and extent.
The primary conditions affecting the result depend upon the fall of rain in the district where the outcrop takes place; the quantity of rain-water which any permeable strata can gather being in the same ratio as their respective areas.
The quantity to be obtained in such a case as we have already pointed out, will depend upon the extent of surface possessed by the outcrop of the permeable stratum.
Permeable rock intersected by a dyke and overlying an impermeable stratum is seen in Fig.
Having been subjected to violent convulsions, they are thrown into every possible position and broken by numerous fissures; and as no permeable stratum is interposed, as in the more recent formations, no reservoir of water exists.
As the surface, which is covered by the deposit, is extensive, the water circulates from a distance through permeable strata often overlaid by others that are impervious.
Thus we see that the tendency of ideas to recur in the same order as that in which they have previously occurred, is merely an obverse expression of the fact that lines of wave-movement in the brain become more and more permeable by use.
Underwear should be light and porous, and permeable to air.
The metal does not dissolve nitrogen and is not permeable to it.
Kahlenberg[32] has recently used rubber membranes, that are permeable for solvents like benzene, pyridine, etc.
Films of these precipitates may be formed, under proper conditions, which are permeable to water but not to certain solutes, such as cane sugar, glucose and galactose.
The experiment may be carried out at 280°, a temperature at which palladium readily dissolves hydrogen and is permeable to it.
On this level, later, language continues the process of perfecting in proportion as the hearing perceives better the component sounds of the words and the psycho-motor channels become more permeable to articulation.
It is the age also of motility in which all the psycho-motor channels are becoming permeable and the muscular mechanisms establish themselves.
A lens made of glass will, but this lens is made of rock crystal, which is readilypermeable to ultra-violet.
The separating membranes, you understand, are permeable by these complicated solutions.
On this permeable soil the vegetation is particularly thin.
Irrigation is almost always necessary north of Lake Nahuel Huapi, where the vegas have, as a rule, a soil of coarse alluvia or permeable tufa, which dries up quickly.
Moreover, the soil of the valles is generally composed of coarse andpermeable alluvial deposits, which absorb the rain-storms immediately.
This, however, is on the hypothesis that the planets are notpermeable by the radial stream, which, perhaps, is more consistent with analogy than with the reality.
The chain of green bogs is a consequence of the stratum of permeable sand.
It is through this permeable sand that the profoundly seated springs find their way to the surface,--for the clay is impermeable; and where it comes in contact with the rock on either side of the arenaceous stratum, the bogs cease.
It is possible in salt solutions to strain out the salt mechanically by a suitable filter or "semi-permeable membrane," which permits the water to pass, but retains the salt.
Yes; much of the hardpan in your district is thin enough and underlaid by permeable strata so that drainage is readily secured by breaking up the hardpan.
Coal ashes are exceedingly desirable upon clay land because their mechanical mixture with the fine particles of the clay renders the soil more friable, permeable and better adapted to the growth of most plants.
When the surface is made permeable to moisture, drying may take place rapidly.
In making staves for water-tight barrels, it is essential that they be cut radially in the log, in order that the staves be as non-permeable to water as possible.
In the southern and greater portion of the city, these rocks are of cretaceous formation, and so much less permeable that sinks and other excavations readily fill to overflowing.
Lord Charles Cavendish, by a very ingenious experiment, has found the heat of 400 requisite to render thicker glass permeable to the common current.
It should seem, that to make glass permeable to the electric fluid, the heat should be proportioned to the thickness.
You found the heat of boiling water, which is but 210, sufficient to render the extreme thin glass in a Florence flask permeable even to a shock.
The first question that meets us in the use of the method in medicine is what normal constituents of the body are permeable or impermeable to the X rays.
The most permeable of the normal tissues are cartilage or gristle, and fat.
Beans, peas, wooden toys, and similar foreign bodies, being easily permeableto the rays, will not probably be discovered.
It may be stated, in a general way, that all of the fleshy parts of the body are partially permeable to the rays in a relatively short time; and if the exposure is long enough, they become entirely permeable, so that no shadow is cast.
That the flesh or soft parts are not wholly permeable to the rays is well shown in the skiagraph--i.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "permeable" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: accessible; excretory; penetrable; pervious; porous; runny; weepy
