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Once again I looked across the bay and beheld that wonderful vision of New York floating above a blue haze, a mass of glittering pinnacles and rose-pink walls flaunting snowy pennants of white vapour, and looped to the sombre vagueness of Brooklyn by the long catenary curves of the suspension bridges. As the steamer started I walked aft, that I might not see the dissolution of the phantasy.
They have to be braced by cables, which make catenary curves like suspension-bridges on end." Zani went on with her drawing. Gail said: "It isn't fantasy, then. Look at this. It's a maybe you'll call it a car. Only it looks like a sled. Or maybe a motorcycle." She showed him a finished sketch. With a childish directness, yet a singular effect of direct observation, Zani had drawn a vehicle.
The vehicle had a square black tilt which nodded with the motion of the wheels, and at a point in it over the driver's head was a hook to which the reins were hitched at times, when they formed a catenary curve from the horse's shoulders. Somewhere about the axles was a loose chain, whose only known purpose was to clink as it went. Mrs.
Gail went to look at the drawing, at which Zani labored with a young girl's complacent absorption in something she knows will be approved by a grown-up when it's done. With a gesture, Gail invited Soames to look. He did. Zani had drawn the sky-line of a city, but it was an odd one. There were tall buildings, but their walls were draping, catenary curves.
Where, as is generally the case, the shape of the cone is determined by the distribution of the falling cinders or divided lava which constitutes the mass of most cones, the slope is in general that known as a catenary curve i.e., the line formed by a chain hanging between two points at some distance from the vertical.
If the reader had the patience to work out the few initial terms of this series, which has no limit, because the series of natural numerals itself has none, he would find: e=2.7182818... With this weird number are we now stationed within the strictly defined realm of the imagination? Not at all: the catenary appears actually every time that weight and flexibility act in concert.
Right at the start, however, I see that something about the power-feed must be changed." "What is that?" asked Mary, curiously. "I have only had rigged here one trolley wire. There must be two attached alternately to the catenary cable.
To eliminate any possibility of the trolley wire breaking, a strong steel cable, called a catenary, was slung just above the trolley wire. To this catenary the trolley wire was suspended by hangers at short intervals. These cables were strung from brackets so that a single row of poles could be used, save at the curves, at which cross-span construction was used.
The answer comes: The focus of the parabola describes a 'catenary, a line very simple in shape, but endowed with an algebraic symbol that has to resort to a kind of cabalistic number at variance with any sort of numeration, so much so that the unit refuses to express it, however much we subdivide the unit. It is called the number e.
A similar method of anchoring the main chains was adopted on the Caernarvonshire side. A thick bank of earth had there to be cut through, and a solid mass of masonry built in its place, the rock being situated at a greater distance from the main pier; involving a greater length of suspending chain, and a disproportion in the catenary or chord line on that side of the bridge.
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