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Among the mammalia the fore limbs have become structurally adapted so as to be such diverse organs of locomotion as the stilt-like leg of a horse, the flipper of a seal, the whale's paddle, and the bat's wing, while among the birds the wing may change into a flipper like that of the penguin, or become reduced to a vestige as in Apteryx.

A hundred yards she went and then stopped headway with a jerk as the men slipped the cables over the bitts. The collision had not hurt the tug apparently, although there was no telling whether or not the jolt had weakened her structurally. But Dan was not the man to worry about eventualities.

Beast and fowl, reptile and fish, mollusk, worm, and polype, are all composed of structural units of the same character, namely, masses of protoplasm with a nucleus. There are sundry very low animals, each of which, structurally, is a mere colourless blood-corpuscle, leading an independent life.

The support of the aeroplane should never be taken from it. While it may be impossible to prevent a machine from coming down, it can be prevented from overturning, and this can be done without in the least detracting from it structurally. Reversing Motion. The plan suggested has one great fault, however. It will be impossible with such a structure to cause it to fly upside down.

Thus the hand and arm in man are structurally or essentially the same as the leg of the brute, the wing of the bird, the flipper of the whale, and the fin of the fish; and the endeavor to adapt itself to the water caused the bird to develop a fin, as by a similar process the fore-leg of brutes developed into the human arm and hand.

It is quite possible to preserve random shapes and rock faces in stonework that is structurally good, yet still fail in a measure to please the eye and satisfy the artistic sense.

Beauty of contour and unbroken continuity of curve is obtained sometimes by sacrificing literal accuracy; a structurally impossible position as the seated nude figure in the Louvre picture is deliberately adopted to heighten the effect of line or the balance of composition.

It, and all elongated forms, are still more objectionable placed horizontally, because this is the weakest position they can structurally have; that is to say, less light is admitted, with greater loss of strength to the building, than by any other form.

It seemed to be satisfied, but I thought the plan poor, and structurally weak, on account of the distance between the forward supports and those abaft. With age the dog's back was likely to sag; and it seemed to me that it would have been a stronger and more practicable dog if it had had some more legs.

It is my impression that, with rare exceptions, people are born with actual structural weaknesses, local or general, that may be called ancestral legacies. These are known as constitutional tendencies to disease. In parts structurally weak at birth the bloodvessels, because of thin and weak walls, are larger than in normal parts, and because of dilatation the blood circulates slower.