The clasping movement of the extremity is apparently not steady, but undulatoryor vermicular in its nature, as may be inferred from the curious manner in which the tendrils of the Echinocystis slowly crawled round a smooth stick.
The undulatorytheory rests on a molecular hypothesis.
This was a renewal of the debate which divided physicists a century ago about light; Crookes took up the emission theory, abandoned for light; Hertz held to the undulatory theory.
This undulatory motion, or impulse, is transmitted from each particle of water to its neighbouring particle, until it reaches the last drop of water on the shore.
Although it caused no damage, itsundulatory motion was sufficiently strong to affect certain persons with a sensation akin to sea-sickness.
If the longer axis of the ellipse be vertical, the main force of the concussion is directed upwards; if the shorter one be upright, the shock is an undulatory one.
A sudden upward shock may wreck the roofs or floors of buildings, while an undulatory one brings down the walls.
Before leaving the forest we crossed some flat little lawns, around which single trees stood, as in an English park: I have often noticed with surprise, in wooded undulatory districts, that the quite level parts have been destitute of trees.
If disturbed they either enter the hole, or, uttering a shrill harsh cry, move with a remarkably undulatory flight to a short distance, and then turning round, steadily gaze at their pursuer.
The frequency and character of the undulatory curve is modified by physical and chemical influences.
This emission theory of light was abandoned in favour of Huygens' undulatory theory.
Both refraction and dispersion are due to the unequal resistances of the medium to undulatory movements of different periodicity.
It was said that the phenomena of interference and diffraction could not be explained by the theory of emission, while the undulatory theory gave a simple explanation.
Some of the phenomena of radiation can be explained only by the emission theory, and others by the undulatory theory of light.
But both agree in the undulatory lines, either of the currents or the surface, and in the introduction of fish as explanatory of the meaning of those lines (so also the Egyptians in their frescoes, with most elaborate realisation of the fish).
The art of registering the shocks and undulatory movements of earthquakes.
Who knows but that some third hypothesis, including all these phenomena, may in time leave the undulatory theory as far behind as that has left the theory of Newton and his successors?
Even the undulatory hypothesis does not account for all the phenomena of light.
The woman looped up her veil, festooning it about the undulatory roll of her hat brim.
His mind was still touched into mystery by the spirit housed in that uncouth and undulatory flesh.
Proceeding from the coast escarpment inwards, I crossed, in a space of about thirty miles, an elevated undulatory district, with the beds dipping in various directions.
After having ascended to a considerable height, we come to an undulatory district in which the famous silver mines are situated; my examination was chiefly confined to those of S.
Most snakes are capable of employing two or more of these types of progression, at least to a certain degree; but horizontal undulatory locomotion is the most common method used by the majority of snakes, including the cottonmouth.
When swimming, a motion resembling horizontal undulatoryprogression is used.
Such are the arrangements intended for the record of the undulatory or horizontal elements of the wave of shock.
But some of these, as for example during the Lisbon earthquake in 1755, may have been mere vibrations orundulatory movements of the earth's crust prolonged from a great distance.
One of the most common phenomena attending subterranean movements, is the undulatory motion of the ground.
Sometimes a striped snake, bound to greener meadows across the stream, ends its undulatory progress in the same receptacle.
The explanation is probably to be sought in those phenomena which have given rise to the theory of action at a distance, and in the properties of light which have led to the undulatory theory.
But therewith the conception of the ether has again acquired an intelligible content, although this content differs widely from that of the ether of the mechanical undulatory theory of light.
A genus of motile bacteria characterized by short, slightly sinuous filaments and an undulatory motion; also, an individual of this genus.
His total ignorance of science may perhaps excuse him for having admitted into the "Review" Brougham's intemperate article on the undulatory theory of light, a discovery which has immortalized the name of Dr.
He proved the undulatory theory of light by direct experiment, but as it depended upon the hypothesis of an ethereal medium, it was not received in England, the more so as it was contrary to Newton's theory.
Still the Undulatory Theory had undoubtedly dawned upon the mind of this remarkable man.
Subsequent to Boyle the colours of thin plates occupied the attention of Robert Hooke, in whose writings we find a dawning of the undulatory theory of light.
This consensus of evidence is one of the strongest points of the undulatory theory.
The undulatory theory affirms that the rings are caused by the interference of waves reflected from both surfaces.
Colours of Crystals in Polarized Light explained by the Undulatory Theory.
Accept if you will the scepticism of Mr. Mill[19] regarding the undulatory theory; but if your scepticism be philosophical, it will wrap the theory of gravitation in the same or in greater doubt.
According to the undulatory theory, the velocity of light in water and glass is less than in air.
