There is a good deal of variation in the colour of the fur, the prevailing tint being grey.
The greatest variation, however, is seen in the tentacles.
Varius), there is much individual variation in this respect, scarcely any two being alike.
Daily Variation.-The figures in Table XII.
One variation is illustrated in fig.
The diurnal variation showed only a single maximum and minimum, between 5 and 6 P. M.
The two last curves in the diagram contrast the diurnal variation at Kew in potential gradient and in barometric pressure for the year as a whole.
The variation throughout the year diminishes as one approaches the equator.
At Karasjok and Kremsmunster the seasonal variation in a i seems comparatively small, but at Potsdam and the Bureau Central it is as large as at Kew.
Annual Variation.-When observations are made at irregular hours, or at only one or two fixed hours, it is doubtful how representative they are.
The shape mostly used is the " saddle " boiler, or some variation upon this very old pattern.
He maintained that, under varying conditions, two substances could combine in an indefinitely large number of different ratios, that there could in fact be a continuous variation in the combining ratio.
The somewhat remarkable resemblance between the diurnal variation for the two elements, first remarked on by J.
And intended to eliminate irregular changes, but they also to some extent eliminate regular changes if the hours of maxima and minima or the character of the diurnal variation alter throughout the year.
There Seems A Fairly Well Marked Annual Variation In Ionic Contents, As The Following Figures Will Show.
He also found a marked diurnal variation, A being considerably greater between 3 and 5 A.M.
There is a difficulty in reconciling observed values of the ionization with the results obtained from balloon ascents as to the variation of the potential with altitude.
Deals with the variation of thunder over longer periods.
But with all these often opposed conditions, we find less variation than might be expected, the main and really important divergence being due to the necessity of transposition, which added a very high pitch to the primarily convenient low one.
In 1727 he gained the prize given by the Academie des Sciences for his paper "On the best manner of forming and distributing the masts of ships"; and two other prizes, one for his dissertation "On the best method of observing the altitude of stars at sea," the other for his paper "On the best method of observing the variation of the compass at sea."
The winds are liable to little variation; they blow from the west, often with great violence, for nine months in the year, and at other times from the north; and they moderate the summer heats, which are chiefly felt during the months of July and August, when the hot winds blow from the coast of Anatolia.
One important variation, however, was a clause in the bill of rights providing for the abolition of slavery, Vermont being the first state in America to take such action.
Variation in resistance of the transmitter spoken into causes a variation of the pressure at the line terminals of the impedance coils, and since those terminals are common to the two circuits the variable E.M.F.
The calyptoblastic polyp of the nutritive type is very uniform in character, its tendency to variation being limited, as it were, by the enclosing hydrotheca.
An important variation is seen, in the form of the hydrotheca itself, which may come off from the main stem by a stalk, as in Obelia, or may be sessile, without a stalk, as in Sertularia.
But the causes and conditions of variation have yet to be thoroughly explored; and the importance of natural selection will not be impaired, even if further inquiries should prove that variability is definite, and is determined in certain directions rather than in others, by conditions inherent in that which varies.
These are discussed under the headings Heredity; Mendelism; and Variation And Selection.
The opening and closing of the stomata is the result of variation in the turgidity 01 their guard cells, which is immediately affected by the condition of turgidity of the cells of the epidermis contiguous to them.
The extent of the area affected and of the variation in the turgor depends upon many circumstances, but we have no doubt that in the process of modifying its own permeability by some molecular change we have the counterpart of muscular contractibility.
This subject brings the domain of pathology, however, into touch with that of variation, and we are profoundly ignorant as to the complex of external conditions which would decide in any given case how far a variation in form would be prejudicial or otherwise to the continued existence of a species.
Stas carried out such experiments on the composition of silver chloride and of ammonium chloride, but he never found a variation of one part in 10,000 in the composition of the substances.
- Annual Variation Potential Gradient.
Annual Variation.-Table I.
The diurnal variation in summer at the latter station is shown graphically in the top curve of fig.
The turgidity in the cells of a growing member is not uniform, but shows a fairly rhythmical variation in its different parts.
It has been the habit of biologists to use the terms variation, selection, elimination, correlation and so forth, vaguely; the new school, which has been strongly reinforced from the side of physical science, insists on quantitative measurements of the terms. When the anatomist says that one race is characterized by long heads, another by round heads, the biometricist demands numbers and percentages.
The following are a few of the more general works: Bateson, Materials for the Study of Variation; Bunge, Vitalismus and Mechanismus; Cope, Origin of the Fittest, Primary Factors of Organic Evolution, Darwin's Life and Letters; H.
The Italian and Sicilian Albanians are of Tosk descent, and many of them still speak a variation of the Tosk dialect.
"Only once in my life to get an old wolf, I want only that!" thought he, straining eyes and ears and looking to the left and then to the right and listening to the slightest variation of note in the cries of the dogs.