A more or less continuous layer of marine clay, rich in fossil shells, overlies the boulder clay, ensuring, wherever it is present, a soil of good quality.
The bottom of the stream should be covered with a layer of sand and small gravel, carefully avoiding large stones and sharp-edged flints.
As the upper shelly layer scales off, the membrane attached to it is likewise thrown off.
The shelly layer forming the basis, in most of the species, is very thin, and is finely plicated owing to its edge folding between the ridges or septa that form the basal edges of the shell; this is very conspicuous in P.
An unusually thick cancellated layer in most cases forms the under side of the basis.
Hence the very base of the shell is not of this colour; nor are the uppermost and still more deeply corroded portions, for here the orange-coloured layer has been removed.
The basis has a thick, underlying, finely cancellated layerof shell.
The shelly layer forming it, is thin, finely furrowed, and not permeated by pores.
Tubicinella they are confined to the basis: in Xenobalanus, they form a layer over the basis and likewise round the upper part of the peduncle-like body, which answers to the shell of other sessile cirripedes.
Where a wide ulcer has eaten away the deep-seated layer out of which the epidermis grows, or where this layer has been destroyed by an extensive burn, the process of healing is very significant.
The layer of organic units lying in contact with the yelk must be those through which the yelk is absorbed; and so must be adapted to the absorbent office.
Here, then, in whatever way we interpret it, the fact is that there quickly arises an outer layer different from the contained matter.
After the mucous and serous layers of the embryo have separated, there presently arises between the two a third, known to physiologists as the vascular layer--a layer out of which are developed the chief blood-vessels.
In such types as the Foraminifera, which, almost structureless internally though they are, secrete calcareous shells, it is clear that the nature of this outer layer is determined by inherited constitution.
They are furnished with a layer of fat, which lies underneath the skin.
We see this in the homogeneity of the stratified rocks, layer upon layer for thousands of feet as uniform in texture and quality as the goods a modern factory turns out, every yard of it like every other yard.
Allow time enough and force enough, and a layer of granite may be bent like a bow.
The erosive forces have been working whole geologic ages longer on the top layer of rock than on the bottom layer; hence the topmost ones are entirely gone or else reduced to small dimensions.
Each new layer of rocky strata taken on showed a marked change in color and texture.
The negative, which must be unvarnished, is leveled, and covered with a layer of warm gelatine solution (one in eight) about as thick as a sixpence.
The top floor is by the intervention of the layer of malt between it and the fire prevented it from coming into direct contact with heat of a dangerous and damaging degree.
It is also convenient to prepare the hydrofluoric acid extemporaneously by the action of sulphuric acid on fluoride of sodium; and, in many cases, it is advisable to thicken up the film by an additionallayer of gelatine.
Running the full length of the table is a thin layer of sand, supported and pressing against the diaphragm, and lying in this sand is the anode, formed preferably of lead.
The water of the Amu and the very thin layer of ooze which it deposits render the oasis very fertile.
The existence of these tumours is dependent on anomalies of development; the tissue which forms the primitive kidney belongs to the same layer as that which gives rise to the muscular system (mesoblast).
This layer is perforated by the bee with its fore-legs, and is closed before the bee flies away.
In each honey-cell there is a cream-like layer or covering of a thicker consistency than the honey itself.
There was a dull roaring in his head and a burning torment in his lungs, and there came moments of despair when he wondered whether his strength would last until he had clawed through the remaining layer of earth.
Remembering the length of the incline at the farther end of the passage, he judged that the layer of soil could not be more than four or five feet deep.
A thick white coating of hoar-frost, as thick as a layer of snow, is on the under surface.
Either a layer of air is cooled in a body below the dew-point; or a mass of warm and moist air rises into a mass which is cold and dry.
Of the sun's rays which reach the earth, those that fall on the land are absorbed by the surface layer of about 4 feet in thickness.
This mixture was made in order to give consistence to the oil, so that a thick layer could be applied, which would exclude, at least to a large extent, the moist air, and would be easily visible.
A layer of this sand, moistened to the same degree as that over the seeds, was spread over a glass-plate; and when the layer was .
Seeds of Phalaris were covered with a layer one-fourth of an inch in thickness of very fine sand, consisting of extremely minute grains of silex coated with [page 475] oxide of iron.
The sensitiveness of the tip cannot be accounted for by its being covered by a thinner layer of tissue than the other parts, for it is protected by the relatively thick root-cap.
I wonder what we should see if our hearts were, so to speak, drained off, and the very bottom layer of every thing brought into the light.
Dunny has the biggest heart in the world, with a cayenne layer over it, and this layer is always thickest when I am bound for distant parts.
This operation is prolonged until the layer is judged to be sufficiently thick, this depending upon the dimensions, form, or construction of the vessel.
This mixture gradually hardens against the porous sides with which it is in contact, and, when the thickness of the hardened layer is judged sufficient, the mould is emptied by inverting it.
Layer upon layer of clay is deposited by the sea in front of the dikes, until a new fringe has been added to the coast-line on which sea-grasses grasses begin to grow.
One thin layer of this metal within a few inches of the external covering of aluminum will serve you a much better purpose and will greatly reduce the cost of construction.
Now try with the rod and see if there be another layer of ice within reach.
The separation of the oil from the water in this last fraction is a simple matter, because the hydrocarbons float as a distinct layer on the water, and do not mix with it.
Quiz brought up the rear with a shovel, scooping up loose matter that had tumbled back into the ditch and sluicing a light layer of soil across the ground in front of the line.
Underneath the bark there's a thin layer of living matter called the cambium, which can be compared with the underskin on a human being--the dermis.
As a matter of fact, even as Dave stared downward, the Victory seemed to merge right in with a thick layer of soot black smoke.
No, it hadn't cut all the way through, but later the bumping of the canteen against Freddy's leg as he trudged across the sand had caused the paper thin layer of metal left to part and crack and allow the water to seep through.
It was caked in his hair, caked on his face, and was sticking like a layer of white glue to his tattered uniform.
Farther down the cliff is a second layer representing an older city, and farther down still a third layer, the remains of yet another city of vast and unknown antiquity.
Immediately beneath this roll was something hard and heavy, wrapped up in yellow linen, and reposing upon another layer of the fibrous material.
Beneath these tombs is a layer of débris representing a city.
But his gaze pierced through the dreams, through layer on layer of purple black, to where stars lay.
They strolled down the canyon, picking wild-flowers, then returning home, decorated the rooms and discovered that Juan had made a chocolate layer cake for their enjoyment.
The committee, armed with heaping plates of the frozen delicacy, flanked by generous slices of chocolate layer cake, moved swiftly among the audience.
The formation is, I may say, entirely sandstone, overlaid in many places by a layerof lava-like ironstone.
