Teneriffe; and the little Helix hispida, which you may search for in your own garden; it is small, dark brown, and rough.
Elastic Spiral Wing, which twists and untwists during its action, to form a mobile helix or screw.
In the helicoid cyme there is also a false axis formed by the basal portion of the separate axes, but the flowers are not placed in a double row, but in a single row, and form a spiral or helix round the false axis.
At the same time he determined the distinct character of a most minute species, Helix minutissima, which had been described as such thirty years before, but which the later authorities had believed to be the young of another species.
Among the shells we found a Helix of a brownish colour and of an oval form, approaching that of Bulimus.
Mr. Gilbert found a land crab in the moist ground under a log of wood; and Mr. Calvert brought me a species of helix of a yellowish green colour.
Large specimens of helix were frequent on the Vervain Plains, but they were only dead shells.
It is manifest that if a second helix be placed between the poles SN with a cylinder within it, the action upon the astatic magnet may be exalted.
The helix being 12 inches high, a cylinder of soft iron 6 inches long, suspended from a string and passing over a pulley, can be raised or lowered within the helix.
Here then we have an excited helix which itself has no action upon the magnets, and we are thus enabled to examine the action of a body placed within the helix and excited by it, undisturbed by the influence of the latter.
Such a helix is caused to stand between the two poles N'S' of an astatic system.
The middlehelix was so arranged that a voltaic current could be sent through it at pleasure.
The 5 Barawan women have ears of European type; angle slightly prominent in 2, prominent in 3; lobule distended in all; descending helix infolded less than 2 mm.
The DNA molecule is in the form of a double-stranded helix that is supported by a protein backbone.
The many shells of the moisture-loving snailHelix nemoralis, found in the fire-hearths of Mas d'Azil are proofs of the humidity of the climate, a fact confirmed by the contemporary flood deposits of the Arize.
Between the helix and the antihelix is the fossa of the helix.
Round the margin of the external surface in its upper three quarters is a rim called the helix (fig.
Concentric with the helix and nearer the meatus is the antihelix (c), which, above, divides into two limbs to enclose the triangular fossa of the antihelix.
On the cranial surface of the pinna elevations correspond to the concha and to the fossae of the helix and antihelix.
Those for the tragus and anterior part of the helix belong to the first or mandibular arch, while those for the antitragus, antihelix and lobule come from the second or hyoid arch.
The tubercle for the helix is dorsal to the end of the cleft where the two arches join.
The helix or thread is then obtained by drawing the curves through the intersections of similar divisions.
Then a b will be the helix for point of the blade, and c d the helix for the root of the blade.
The point of intersection would then continually return upon its own track in a series of minute loops forming those lesser loops, which, moving circle-wise, registered the involvement of the helix in the plane.
Next conceive of the wire itself as a lesserhelix of many convolutions, and repeat the experiment.
After the wire helix was completed it was wrapped with a sheet of expanded metal, the longitudinal edges of which lapped a few inches and were tied by wire ties.
In fabricating the shells the first step was to wind a helix of steel wire on a collapsible mandrel about 4 ft.
The curve of contact of a circumscribed cylinder is a helix whose step is half that of the surface.
Notions on the helix and the developable helicoid.
The current in the helix magnetizes the circuit wire inclosed, and the galvanometer exhibits the presence of electricity.
The professor employs a helix connected with a battery, and surrounding a portion of the wire in circuit with the galvanometer.
The helix shows moderate development on the whole and is submedium otherwise except for a 9 per cent incidence of pronounced appearance.
In other species of Helix a second duct (as large in Helix aspersa as the chief one) is given off from the spermathecal duct, and in the natural state is closely adherent to the wall of the uterus.
In construction,~ the coils are made of aluminum rod wound into a helix of about 15 inches in diameter and having 20 turns.
A coil, or helix of wire, has a stronger field than a straight wire carrying the same current, because each turn, or convolution, adds its field to the fields of the other turns.
The air around and inside of a helix offers a great resistance to the lines of force, and tends to weaken the magnetic field.
In such a case we cannot define the species by Helix putris alone, but must append the name of the author whom we quote.
The helix obviously consists of the extreme margin of the ear folded inwards; and the folding appears to be in some manner connected with the whole external ear being permanently pressed backwards.
Meyer, Professor Ludwig, onhelix of the human ear, 86.
