Drift net

“ The facts, however, are as I have stated them, and the difference may be due partly to the broken character of the ground over which the drift must have passed in Europe, subjecting it to a more violent process of friction and grinding than in America, and partly to the use that has been made of the drift-boulders during so many centuries for building-purposes in the Old World, the drift-boulders being naturally taken first, because they are more easily reached, while the angular ones are frequently perched on almost inaccessible spots. ”

“ The open places amid the drift were faintly shimmering, reflecting the feeble light that shone through the clouds from the stars; the drift itself loomed in fantastic shapes of pure black on the water. There were logs and patches of sticks and grass; lumps of straw-stacks; the rectangles and triangles of sides of buildings; barrels and hogs heads; tangles like jackstraws of lumber and trees. It was as if everything that will float had its kind in the masses, around which were straits and ponds and open waterways as smooth as blown glass. ”

“ Water in motion is called a current; the direction toward which it moves is called set, and its speed is called drift. Modern shipping speeds have lessened the impact of currents on a typical voyage, and since electronic navigation allows continuous adjustment of course, there is less need to estimate current set and drift before setting the course to be steered. Nevertheless, a knowledge of ocean currents can be used in cruise planning to reduce transit times, and current models are an integral part of ship routing systems. ”

“ He found a cunning circuit arranged so that if the ship rose on interplanetary drive and set out on even a hopeless search for home, the instant it went into overdrive its power tanks would fuse and short, and it would be left driveless and powerless, to crash or drift helplessly until its occupants died or went mad of despair. ”

“ The First Drift, which, as they were coming up stream, was their last, is broader, and not as deep as the others; but in those days it was full of boulders, and the water raced down in three separate channels, although the surface showed but one broad stream. The drift is now higher up, where the bed is even, and the current is not so strong. They have also a wire rope across, and a ferry-boat; but it was not so in ’87. They have done a good deal to improve things, but still the river is king, and asserts itself upon occasion ”

“ The drift was twisting all around them, and they could see the big logs crawling through the mass, could feel them straining underfoot; and between them and the boat water appeared among the flotsam. It was a fearful moment, for the squeeze had ended, and the mass of drift was breaking up and separating in little lumps. They saw the house-boat settling down as the logs rolled and floated from under her. Their own island began to flatten down and spread out. Sib caught the unconscious boy in his arms, and held to the branch that he had used for a snub. ”

“ It follows that a pure trade-wind drift cannot reach to any great depth, and this seems to be confirmed by observation, as when tow-nets are sunk to depths of 50 fathoms and more in the region of the equatorial current they always show a strong drift away from the side of the ship, the ship itself following the surface current. ”

“ The sheet of drift was once more continuous and extensive than it is now, and the localities in which we find these crops of boulders are spots where the tide has eaten into the drift, wearing away the finer materials, or the paste in which the larger fragments were imbedded, and allowing them to fall to the bottom, or where the same result has been produced by the action of rivers cutting their way through the drift, and thus finding an outlet to the sea. ”

“ One can drift a riffle stern first that is too rough to ride any other way. Facing down-stream, and pulling against the current the headway of the boat is checked and it is easier to shoot it to right or left to avoid an obstacle. If the riffle is not too rough to make the control of the boat impossible when rowed bow-first with the stream, drifting means the cutting down of speed and the loss of much good time. ”

“ At anchor the lead line is usually secured to the rail with a little slack and if the ship drags anchor, the line tends forward. A drift lead is also used to indicate when a vessel coming to anchor is dead in the water or when it is moving astern. A drift lead can be used to indicate current if a ship is dead in the water. ”

“ Beating their way up the river flood was very different from coming down, and it was awe inspiring to the boys to press against the vast current, winding and curving to miss the onrushing chunks of drift. In eddies they could swing out into the reverse current and run with the circling waters, but at the heads of eddies they had to put on all their power and nose into the swirling sucks where the fast main flow insolently turned the eddy back into the true direction again. ”

“ When a drift-current impinges directly upon a coast there is a heaping up of surface water, giving rise to a counter-current in the depths, which maintains the level, and this counter-current, although subject to deflection on account of the rotation of the earth, is deflected much less than a pure drift-current would be. Such currents, due to the banking up of water, have a large share in setting the depths of the sea in motion, and so securing the vertical circulation and ventilation of the ocean. ”

“ While the drift was by a devious and very irregular course, yet it was in the general direction of northwest, from 71° 35 ́ N., and 175° W., at besetment, to 71° 15 ́ N., and 155° E., when the ship was finally crushed by the pack. In investigating the cause of the drift, De Long 318 says: “As to the currents in this part of the Arctic Ocean, I think our drift is demonstrating that they are the local creation of the wind for the time being. As our drift in resulting direction has been northwest since our besetment, so the greater amount of wind has been from the southeast ”

“ When the bottom side drift plan of excavation is employed, the spoil from the front of the drift is removed in narrow-gauge cars running on a track laid as close as practicable to the center core. These same cars are also employed to take the spoil from the drifts above, through holes left in the ceiling strutting of the bottom drifts. The spoil from the soffit sections may be removed by the same car lines used in excavating the drifts, or a narrow-gauge track may be laid on the top of the center core for this special purpose. ”

“ He entered upon an acre of perfectly open water, and on the far side was running through a narrows hardly fifteen feet wide when he saw a black mass of drift shoving down across the way ahead of him. He heard the wet wood grinding and the dull snap of breaking branches.
Instantly he fell against the sweeps, to stop the boat in its course; he pulled out of the closing gap, and turned through the wide water to skirt around the moving mass—not for a moment worried, because he had seen in time the thrust of the coming squeeze. ”

“ An advantage that the drift method affords in long tunnels is, that the water, which is usually found in large quantities under high mountains, is easily collected in the drift and conveyed to the culvert, while in the heading method the water from the advance gallery, before being collected into the culvert built on the floor of the tunnel, must pass through all the workings. This may be a serious inconvenience when water is found in large quantities, as, for instance, was the case in the St. Gothard tunnel, where the stream amounted to 57 gallons per second. ”

“ The ordinary sailing drifter is rapidly being superseded by the steam drifter, partly because the greater power of the steam driven boat increases its capacity and scope, and, further, owing to the centralization of the industry at a few big ports at certain times of the year, these harbours are so crowded that it is almost impossible to handle a sailing drifter in them. ”

“ The interferometer has, therefore, been mounted on high ground near Cleveland, and covered in such a manner that there is nothing but glass in the direction of the expected drift. It was much more difficult to make observations in this location than in the building; satisfactory observations could only be made on a cloudy evening following a cloudy day, when the temperature changed very slowly. The temperature effects could never be entirely eliminated. The conclusion from many observations is that there was no indication of a drift of the ether through the interferometer. ”

“ In a famous article, Saltzer, Reed, and Clark provided the argument that an "end-to-end" network that is "dumb" and leaves processing to the "ends"—the smart terminals at either end of the wires—will be stable and robust.31 But it will also be remarkably uncontrolled and it will lower global copying costs close to zero for digital content. It is that principle that has made it successful. To put it tersely: the logic of the Internet Threat runs in exactly the opposite direction to the Internet itself. The logic of control is not the logic of the Net. ”

“ The day when a drift is to take place is kept a profound secret till it is proclaimed early in the morning. Then a messenger on a fleet horse is sent round very early to announce it. On certain tors are holed stones, and through these horns were formerly passed and blown on such occasions. There are drifts for ponies, and drifts for bullocks. A drift is an animated and striking scene. Horsemen and dogs are out, the farmers identifying their cattle, the drivers and dogs sending the frightened beasts plunging, galloping in one direction towards the place of gathering. ”

“ Never had she gone faster. Under the forced draught in the sweating stokeholds below, the firemen toiled desperately. Steam screeched from the ’scape pipes in a constant roar, testifying to the big head of power being carried in the ship’s boilers.
It was a race to thrill the most critical, and a contest of speed, too, which had, as its goal, a human life; for, from the frantic signals now being made by the man on the drifting flying-boat, it was plain that he did not expect to keep above the water much longer.
The Mexico’s wireless man was signaling Jack. ”

“ She would summon a car and it would fly with her down the tunnel until it reached the lift that communicated with the air-ship station: the system had been in use for many, many years, long before the universal establishment of the Machine. And of course she had studied the civilization that had immediately preceded her own – the civilization that had mistaken the functions of the system, and had used it for bringing people to things, instead of for bringing things to people. Those funny old days, when men went for change of air instead of changing the air in their rooms! ”

“ The Drift tools with a chipped curvilinear edge at one end, which were probably used for dressing leather and other scraping, are a good deal like specimens from America. The leaf-shaped instruments of the Drift differ principally from those of the Scandinavian shell-heaps, and of America, in being made less neatly and by chipping off larger flakes ”

“ Drift described.—There is a movement of the waters of the ocean which, though it be a translation, yet it does not amount to what is known to the mariner as "current," for our nautical instruments and the art of navigation have not been brought to that state of 'perfection which will enable navigators generally to detect as currents the flow to which I allude as drift. ”

“ In some drifts the rock stands without being timbered. The main north and south drift, generally the first reached after leaving a station in a mine, is the highway of the level in which it is opened. It has a car-track running through its whole length, and, in some cases, as in the main drift on the 1500-foot level of the consolidated Virginia and California mines, contains a double car-track. ”

“ The answers given by the machine are multiplied by the proper scale factor, and in this way the problem of the power company is solved.
There are two kinds of problems that network analyzers are built to solve: the steady state conditions and the transient conditions. For example, you may not overload a fuse with an electric iron when it is plugged in and being used, but as you pull out the cord, you may blow the fuse: the steady state does not overstrain the system, but the transient does. ”

“ Electrical testing can be conducted at sea with such certainty as to discover the existence of faults in less than a minute of their occurrence. If a steam-engine be attached to the paying-out machinery, so as to permit of hauling-in the Cable immediately a fault is discovered, and a slight modification made in the construction of the external sheath of the Cable, the cause of the faults experienced will be entirely done away with; and should a fault occur, it can be picked up even before it has reached the bottom of the Atlantic. ”

“ The strain of it all began to tell on the young wireless man. He made hourly reports to the shrouded figures on the bridge that looked like exaggerated ghosts in the smother of fog. The lights on the ship shone through the obscurity like big, dim eyes, and the constant booming and shrieking of the siren grew nerve-racking.
Vigilance was the order of the night. Bridge, deck and engine-room were all alike keyed up to the highest pitch of watchfulness. At any moment a message of terror might come clanging from the bridge to the engineers’ region. ”

“ Critics there are in abundance, who declare that the process can never become a commercial one, that it will destroy short-distance Hertzian telegraphy, or that the multiplication of long-distance stations will end in the annihilation of all Hertzian wave telegraphy. No one, however, can contemplate the history of any development of applied science without seriously taking to heart the lesson that the obstacles which arise and which prove serious in any engineering undertaking are never those which occur to armchair critics. ”