Hence the maximum instability occurs when the wave-length of disturbance is about half as great again as that at which instability first commences.
Thus, if one molecule is disturbed from its mean position, it communicates the disturbance to its neighbours, and so a wave is propagated.
When the disturbance of the roots incidental to all transplanting is sought to be avoided, the seed or plant is started in some cases in squares of turf (used grassy-side downwards), which can when ready be transferred to the place the plant is to occupy.
In Mesopotamia and Yemen disturbance was endemic; nearer home, a semblance of loyalty was maintained in the army and among the Mussulman population by a system of delation and espionage, and by wholesale arrests; while, obsessed by terror of assassination, the sultan withdrew himself into fortified seclusion in the palace of Yildiz.
At length the governor of Syria approached the centre of the disturbance in Jerusalem, but retreated after burning down a suburb.
Cady, Terrestrial Magnetism, 1904, 9, 69, describing a declination magnetograph in which the record is obtained by means of a pen acting on a moving strip of paper, so that the curve can be consulted at all times to see whether a disturbance is in progress.
It also enables the bee-keeper to arrange his day's work indoors while avoiding disturbance to such colonies as do not need interference.
Although, outside the information we get from Christian chroniclers, this age is for the people of the north one of complete obscurity, it is evident that the Viking Age corresponds with some universal disturbance or unrest among the Scandinavian nations, strictly analogous to the unrest among more southern Teutonic nations which many centuries before had heralded the break-up of the Roman empire, an epoch known as that of the Folk-wanderings (V olkerwanderungen).
The outbreak of disturbance in the Balkans ended this period of calm.
He determined, therefore, to oppose any further disturbance of the balance of power in favour of Germany, and when the treaty of Skierniewice expired in 1887 he declined to renew it.