Tank (water)

“ Where a steel tank is sunk, or a masonry tank is constructed, regard must be paid, both in the design of the tank and in the manner of construction, to the level of the underground water in the neighbourhood, as in certain cases special precautions will be needed to avoid trouble from the pressure of the water on the outside of the tank until it is balanced by the pressure of the water with which the tank is filled. ”

“ A settling tank is simply a galvanized iron tank with a large faucet at the bottom. The bottom can be made to taper to the center and the faucet placed in the center, so all the water can be drained off, or the bottom can be made flat with the faucet close to the bottom, and the tank can be set slanting, so the water or Lard will all drain out. ”

“ The system of leaching, as it is termed in the States, is conducted as follows:—Iron tanks are used, with suitable piping, that allows pumping from one tank to another, and also to pump from any one of them up to the causticising tanks in the alkali-room. There is also a water-line by which water may be pumped into any of the tanks, and there is a spout used in washing away the black ash sludge. The leaching-tanks have false bottoms of 2in. by 2in. stuff, placed crosswise, over which is a layer of gravel, on which lies a layer of straw, by which the liquor is filtered. ”

“ Its tanks display a varied and superb collection of fish, whose beauty of form and color heightened by swift and graceful motion, fascinates the eye as no museum of dead things, however splendid, ever does. When a tank is still, or nearly still, and a gold-fish or a perch is quietly resting near the surface of the water, one may see its form reflected from that surface as perfectly as if by a mirror. The point of view must be close to the tank, with the eye somewhat lower than the fish. ”

“ Thus there were nearly a hundred animals in this Tank; a number which I found far too great; for though they did not crowd the vessel at all apparently, nor seem disproportioned to the space they occupied, it became evident that the exhaustion of the oxygen of the water went on more rapidly than it could be renewed, either by the evolution from the living plants, or by the combination with this of artificial aeration, by allowing two or three gallons a day to drip from a vessel suspended over the Tank at the height of about four feet. ”

“ But if tanks are constructed of substantial and enduring materials, they possess little if any advantage, on the score of expense, over hot water pipes, while they occupy much more room and are unsightly objects in a well ordered green-house.
Wooden tanks are frequently used where the heat is required to rise perpendicularly from them. If constructed of good pine plank, well put together with white lead, and thoroughly painted inside and out, they will last for several years. Scarcely any heat will be radiated from the sides and bottom of a wooden tank. ”

“ The Tank should be wiped out and rinsed, and then the water should be filtered back into it. This is a very simple process: a funnel (if of glass, earthenware, or gutta-percha, the better) is placed over the tank, with a bit of sponge pushed lightly into the top of the tube, so as to allow the water to run through in a narrow thread-like stream Replace the plants and animals, reserving those pieces of rock, or those shells, which look suspicious, which may be kept in a bowl of water by themselves for a few days, till their state appears more fully. ”

“ All these defects, including that of the necessity for very substantial foundations under the holder to support its enormous weight, may be overcome by adopting the second method of construction. It is clear that the water in the centre of the tank is of no use,--all that is needed being a narrow trough for the bell to work in. Large rising holders are therefore advantageously built with a tank formed in the shape of an annulus, the effective breadth of which is not more than 2 or 3 inches, the centre portion being roofed over so as to prevent escape of gas. ”

“ This is done in a large wooden tank filled with water. If, however, a river or canal runs through the works, a series of wooden tanks, the sides and bottoms of which are pierced with holes, so as to allow of the free circulation of water, should be sunk into a wooden platform that overhangs the surface of the river in such a way that the tanks are immersed in the water, and of course always full. During the time that the cotton is in the water a workman turns it over constantly with a wooden paddle. ”

“ When the water in the soaking-tank becomes overcharged with dirt, by a simple arrangement it can be emptied and refilled with clean hot water from the square tank, in which a constant supply is kept up, in eight or ten minutes. ”

“ A disadvantage of the tank system is that the tank, if placed high enough to supply all flows, is sometimes so far from the boiler that the water loses much of its heat in the course of circulation. Also, if for any reason the cold water fails, tank A may be entirely emptied, circulation cease, and the water in the boiler and pipes boil away rapidly. ”

“ The Water should be pure and bright when introduced to the tank, and if the supply is at all faulty, it will be best to pass it through a filter before using it. Spring water will do very well, but must stand a day or two to allow the plants to soften it, before the fishes are put in. My tanks are all filled with spring water, which I find altogether unobjectionable; but for the marine tank I think it preferable to any other in the manufacture of artificial sea-water. ”

“ The pressure being relieved from the tank, take out the head, use about a water-pail full of fine salt to settle the tank. This salt is scattered over the contents in the tank and has the effect of settling sediment and tissue which may be held in suspension. The tank should stand about two hours to thoroughly settle before drawing the oil. Draw the oil from the side valves of the tank into coolers. It is often necessary, in doing this, to raise the contents of the tank, as there may be considerable tallow or lard below the lowest draw-off valve. ”

“ I have, in describing the fresh water tank, given instructions for its formation, and here desire only to caution the beginner to repress, as much as possible, any desire for mimic arches, caves, and grottos. In the first place, it must be remembered, that every cubic foot of rock work displaces a cubic foot of water, and reduces the capabilities of the tank for supporting a number of creatures. The more rock the less water, and the less water the fewer animals. ”

“ The latter can be painted at intervals, so that it will not rust, and is safer than wood alone to prevent leakage.
Care must be taken to give sufficient strength to the wooden tank; it should never be made of less than two-inch stuff, and should not depend upon nails or screws alone for holding the sides together. Figure 56 shows a suitable way to put together such a tank. Certain firms that make windmills and agricultural implements generally can furnish wrought-iron tanks, warranted to be water-tight, of suitable size to go in an attic. ”

“ I may mention that a great effect has been produced in the case of a tank on one of my coffee estates by thus digging pits to catch water that would otherwise run directly down into the tank, to be largely lost by the overflow during heavy rains, and a similar effect has been produced on the property of a neighbour. In fact, the effect produced by such pits on the supply of water in tanks is far greater than one could have imagined to be possible, and I may therefore, in passing, call particular attention to the advisability of such pits being made near tanks used for agricultural purposes. ”

“ In places which are still less fortunate and, especially in dry times, are at a greater distance from the precious element, there still remains a plan by which sufficient could be secured, and that is the portable water-tank. Our agricultural machinists now turn out handsome and capacious iron tanks which are coming into general use. Now, no one farmer can be expected to send water-tank and team three or four times every evening to fetch [Pg 180] up water for the use of cottagers, not one-twentieth of whom work for him. ”

“ Occasionally it goes into a tank, when it swims with rapid, undulating motions, the limbs being laid back and remaining inactive; it sometimes rises to the surface to emit and to take in air, but, although mostly resting half in the water, upon a rotten stump, it often lies for hours at the bottom without stirring. ”

“ Why, we have inserted it into the great rainwater tank yonder above our heads, which our grandsire contrived, and which is fed from the roofs and battlements of all the towers. Thou hast heard our father tell how he read of such things in days of old, when men built wondrous palaces, and had hanging gardens, and I know not what beside. He set the tank up there, and, as thou knowest, it is not now greatly used, albeit there is always water there, and at times men draw it forth. ”

“ It pierced the tank near the bottom, as I have said, extended in a horizontal line some eight inches, and then gradually turned in a circular manner till the other end, about one foot in length, pointed downward, in an exact right-angle from the end entering the tank. This was put on with a flange, and made water-tight, and in the top of it, about three inches from the tank, was fixed a stopcock, with a long rod, which arose inside the boat, parallel with the side of the tank, till it ended in a handle, situated some ten inches higher than the top of the tanks. ”

“ It puts the producer in direct communication with the carrier and a market at all seasons, regardless of high or low water, rain or storm, mud or dust. The tanks at his wells are connected with the pipe-line by one or more of the two-inch feeders that spider-web the producing-country. Small pumps force the crude, when the location of the well prevents running it by gravity, from these tanks into a receiving-tank of the line, whence it can be piped into the trunk-lines or a storage-tank as desired. ”

“ A condensing apparatus intended for use on the island was made for me by Mr. Hornsey of Southampton. The boiler was a strong twenty-gallon drum, and a forty-gallon tank contained the worm. At sea these two were disconnected and lashed in the saloon, serving as water-tanks. We carried in all 600 gallons of water. The precious fluid was, of course, never used for washing purposes at sea. Salt-water-soap and the Atlantic had to content us for our ablutions, and, where possible, sea-water was employed for cooking purposes as well. ”

“ The winkles accomplish for the marine-tank what the fresh-water snails do for the river-tank, they scrape confervoid growths from the glass, and so help to preserve the crystalline aspect of the tank. ”

“ His most notable improvement was his 'dark-water chamber slope-back tank,' the result of a close study of the rock-pools, with their fissures and chasms, in the rocks on the shores of the Menai Straits. This improvement retarded for a long time the falling off in the taste for domestic aquaria, and the principle of Edwards's tank was most successfully adopted in all the large establishments of this country, and in many of the continental and American zoological schools. ”

“ In this respect many farm and country houses are found to be but very imperfectly supplied. Often the tank is placed only slightly higher than the second story of the house. As a result, the water flows sluggishly at the bathroom faucets, and, in case of fire, no effective fire stream can be thrown. Where a reservoir is suitably located above the house, the pressure is sometimes lost by laying pipes too small in diameter to furnish an ample stream. Elevated tanks should always be placed so high as to afford a good working pressure in the entire system of pipes. ”

“ When a large pit is excavated, fissures, through which water is seen to be freely circulating, are nearly always exposed. Experiments show that—provided a sufficiently large collecting-tank is made, measuring, for instance, 5 by 4 metres, and sunk from 1 to 2 metres below the standing water-level—a supply sufficient to yield a continuous discharge of 8 gallons a minute (equivalent to 11,500 gallons per day of twenty-four hours) can frequently be obtained. ”

“ The wise have said that the excavation of a tank contributes to the aggregate of three, Righteousness, Wealth and Pleasure. A tank is said to be properly excavated, if it is made on a piece of land that is inhabited by respectable persons. A tank is said to be subservient to all the four purposes of living creatures. Tanks, again, are regarded as constituting the excellent beauty of a country. The deities and human beings and Gandharvas and Pitris and Uragas and Rakshasas and even immobile beings—all resort to a tank full of water as their refuge. ”

“ When the tank is covered by one of the elegant domed lids which we have occasionally seen, and which we recommend to exclude dust, and to preclude the escape of such creatures as, like ourselves, are given to roaming, the rock-work as we may term it, may project above the surface of the water, to allow such animals as desire it the means of gratifying' themselves. ”

“ A tank is an artificial receptacle for liquids, thus: a tank engine is one which carries the water and fuel it requires, thereby dispensing with a tender; tank-iron or steel is common plate used in building tanks. Steel is cheaper than sheet-iron. A cistern is primarily a natural reservoir—a hollow place containing water; more commonly an underground reservoir or tank. Closed pressure tanks are usually cylindrical shells similar to a horizontal steam boiler, having bumped or rounded heads to save bracing. Closed pressure tanks are used extensively in connection with hydraulic elevators ”