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And this risk of breakage in the air was increased, in many cases, by the building of experimental machines by men who had no qualifications for their task, and who erred only too frequently, in their desire to attain lightness, on the side of a lack, rather than an excess, of structural strength. There are many cases, unfortunately, that might be cited; but one may be sufficient here.
The structural details, so difficult to explain in words, may be summed up as follows: in front, on the forehead, a diadem of spikes, the ramming and digging tool; behind, a many bladed plowshare which fits into a socket and allows the pupa to slacken suddenly in readiness for an attack on the barrier which has to be demolished; on the back, four climbing belts, or graters, which keep the animal in position by biting on the walls of the tunnel with their hundreds of teeth; and, all over the body, long, stiff bristles, pointing backwards, to prevent falls or recoils.
The simple, strong structural lines assert themselves everywhere, and give that look of repose and security characteristic of the scene. The rocky forces always seem to retreat in good order before the onslaught of time; there is neither rout nor confusion; everywhere they present a calm upright front to the foe. And the fallen from their ranks, where are they?
Furthermore, I believe that they are quite competent to account for all that we may call purely structural phenomena which are exhibited by SPECIES in nature. On that point also I have already enlarged somewhat.
The engineer, when he wishes to increase the margin of safety in his plans, treats as factors in the same quantitative problem both the chemical expedients by which he can strengthen his materials and the structural changes by which the strain on those materials can be diminished.
What connection exists between these several parts is all subjective, but not structural, the impulse to exhibit the wonderful columns in their remarkable perfection of detail being a temptation to which the picture was sacrificed.
So were all twenty of the grounding cables which, each the size of a man's arm, had fanned out in all directions to anchorages welded solidly to the vessel's skin and frame. The anchorages, too, were gone; and tons upon tons of high-alloy steel plating and structural members for many feet around where each anchorage had been. Steel had run like water; had been blown away in gusts of vapor.
With this tendency, whose legitimacy we are certainly far from disputing, it is inevitable that the old doctrine of the mental inferiority of women should be defended, if at all, on a new basis; a basis organic; structural, physiological, hence incontrovertible; on an analysis, not of her reasoning faculties, her impulses, her emotions, her logic, her ignorance, but of her digestion, her nerves, her muscles, her circulation.
Thus an organism proves to be a complex mechanism composed of cells as structural units, just as a building is ultimately a collection of bricks and girders and bolts, related to one another in definite ways.
The effect of distance which was produced by this gradual diminution of light, was still further heightened by various structural artifices. The parts, for instance, are not on the same level. In the temple of Khonsû the difference of level is not more than 5-1/4 feet, but it is combined with a lowering of the roof, which in most cases is very strongly marked.
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