Part 10

The Commissioners were led to the construction of this well in presence of the danger at any time of some accident taking place in connection with the Brooklyn Water Works which would render it necessary for the Water Board to cut off the Park supply so as to secure the citizens from suffering. This well has more than the necessary capacity to supply the Park abundantly with water, yielding most when most is needed. This is established by the discovery that the time of drought from which the well is, or may be, likely to suffer, occurs in the Fall. Besides these facts, it further appears that in order to furnish the supply of water to the Park the Water Board would have to go through the process of pumping their water twice to convey it to the required elevation, equal to 225 feet from its original level.

The work of the well will be to supply the pools at an elevation of 133 feet. From the pools the water is conducted to the lake. Besides this, there is an independent connection with the lake by which, as necessity may suggest, the water can be directed to the lake, a lift of only seventy feet. The lake, when completed, will occupy an area of fifty acres, which will be kept continually supplied with fresh water, the arrangements being such, or to be such, as will insure a permanent change of water, and prevent any of the evils that may arise from stagnancy. The well is fed from the earth, consisting of a circuit of two miles, with a fall of five feet to the mile. For this reason it does not appear easy to exhaust the supply, as when the water is pumped out to four or five feet from the surface of the well it is replaced at a rate equal to the demand. Every allowance has been made for evaporation from the lake and pools, and the supply is regarded as inexhaustible. Another important fact here suggests itself; that is, that sufficient rain falls during the season in the area of two miles around the well to make the supply perennial. The Prospect Park well is a credit to Brooklyn.--_New York Times_.

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PAPER FOR BUILDING.

Our readers will find in another column an advertisement of this new building material which is now attracting much attention in the West, and of which we have received very favorable reports. It has been recently tested in Chicago with the result we are informed of fully establishing its utility. It is said that a house twenty-two feet long, sixteen wide, and fourteen high, can be covered on the outside for less than $9; and a house thirty-six feet by twenty-two, and twenty feet high, for $20. The building can be done at any season, and can be finished with great speed, and there are said to be numerous other advantages connected with the use of the paper. It differs from ordinary paper in consistency, compactness and solidity. In the manufacture it is subjected to a pressure of hundreds of tuns, which squeezes out the liquid matter, leaving a substance of the right thickness. It is said to be proof against damp and gnawing of vermin, and it being an excellent non-conductor of heat, must make a warm dwelling in winter and a cool one in summer. It is used in the place of plastering for inside walls.

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The Prussian Government has military maps of every foot of its territory so complete that every hill, ravine, brooklet, field, and forest is delineated with perfect accuracy. It is a common boast of Prussian military men, that within the space of eight days 848,000 men can be concentrated to the defense of any single point within the kingdom, and every man of them will be a trained and well-equipped soldier.

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Improved Muzzle-Pivoting Gun.

We are indebted for the following able description and criticism of this Prussian gun to our able contemporary, _The Engineer_.

Viewed as a piece of mechanism, nothing can well be more beautiful in mutual adaptation of parts to the fulfillment of given and rather recondite movements, and in point of execution, than this muzzle-pivoting arrangement of Herr Gruson's; but having said this we are compelled to add, as impartial engineering critics, that it is nothing more.

A very few words of description, aided by the very clear engraving annexed, will suffice to make the arrangement plain to every mechanical reader. The entire structure is metallic, chiefly of cast iron or of steel. Upon the platform of the casemate, or deck of the ship, or turret, is laid the heavy bed or traverse plate, cast hollow in iron, holding the vertical pivot at its forward end, on which the gun slide traverses in azimuth, and at its rear end the segment plate, bolted down and separately adjustable as to position upon the bedplate. The slide is also a ponderous hollow casting, the upper surfaces of which, on which the gun carriage runs forward or recoils, are curvilinear in a vertical plane, so that the inclination to the horizon is greatest at the rear end. At the rear end of the slide it traverses upon two heavy cast-iron turned conical rollers, which are geared together and actuated by the winch handle and spur gear, seen in our engraving; by these the slide is practically held fast in any position on the bedplate. The gun itself--in the model, a steel breech-loader, on the Prussian regulation system, very slightly modified--is sustained between two high and ponderous cheek plates of cast iron, which constitute the sides of the carriage, and which are connected together strongly at the lower edges by a heavy base or bottom plate, and at the top by two light cross distance bolts. The muzzle and breech extremities of the piece project well beyond those cheeks. Along the bottom of the trough of the carriage, directly under the gun, lies a nearly horizontal hydraulic press cylinder, the pump and handle actuating which are seen in the figures to the proper left of the gun, and the supply of water for which is contained in the hollow bottom of the carriage. On each side cheek of the carriage is formed, by curved planing, a circular segmental race, opening inward or toward each other, rectangular in cross section and into each of which is fitted a segmental block just filling it up, and occupying a portion of its length so as to slide easily up or downward through the whole range of the arc or segment.

The center point of the length of each of those blocks carries one side of the gun, which is connected also with the two heavy radius bars seen outside the cheeks, and pivoted close to the segment races on the outside, and with a system of link work between the gun itself and the crosshead of the ram of the hydraulic cylinder, which gives motion to the gun in elevation or depression, through a vertical arc, the imaginary center of which, and of the segments of the side cheeks, is situated in the horizontal diameter across the muzzle of the gun. This is in brief the muzzle-pivoting part of the arrangement, of which, were it worth while to go into its details, we should need some further diagrams to make it quite clear. Nor is it worth while to go into the description of various minor points of refinement about the gun mounting, such as the very exposed long tangent scale seen in the figure, by which the elevation or depression is read off, nor the still more exposed and rather ricketty arrangement by which the rear sight is arranged to rise and fall with the gun, and allowance for dispart avoided. The recoil of the gun is resisted through and by the segment blocks in the side cheeks, and by the heavy radius bars, etc., and thus transferred to the carriage itself. This moves upon four eccentro-concentric rollers, in all respects identical with those brought before the Ordnance Select Committee of Woolwich by Mr. Mallet, in 1858--then rejected, after some time adopted, and brought into use in our own service, where they are now universal, and from which they have been adopted into every artillery in the world, and, we understand, without the slightest recognition of the inventor's rights. On the axle of each of these rollers is keyed a circular eccentric cam plate, those at the same side being connected together by a linking bar so as to move in concert. Adjustable tripping plates attached to the sides of the slide, are so arranged that when the loaded gun has been run forward its carriage base rests hard down, with its full weight upon the top faces of the slide, and thus the recoil is made under the full resistance due to the friction of the entire load. Arrived at the highest point, it rests there until loaded. The cam plates being then given a slight motion of rotation by the help of socket levers--the rectangular projections to be received by which are seen on the top edges of the cam plates in the figure--the carriage, by its own commenced descent, gets again upon its rollers, and runs forward upon these at once into firing position. The two elevated horns which are seen standing up at the rear part of the slide above the roller frame are designed to receive the thump of the two short buffer-blocks--seen at the rear part of each carriage cheek--in the event of the recoil not being wholly expended in raising the weight of gun and carriage, etc., along the curved racers of the slide. These buffer-blocks bear against plugs of vulcanized india-rubber secured in the bottoms of the buffer cylinders.

We have thus, though very briefly, described the whole of this mounting. As a carefully thought out and elaborated piece of elegant mechanical complication Herr Gruson's muzzle-pivoting carriage attracted much attention at Paris, in 1867, and its merits were regarded as great by those whose thoughts went little further perhaps. We should have been glad had it been in our power to have joined in its praise. We are, however, obliged honestly to say that, however highly creditable to its designer as an ingenious and capable mechanism, it shows that he has never realized to himself as a practical artillerist the primary, most absolute, and indispensable conditions of construction for a serviceable muzzle-pivoting gun for either land or sea service.

As to the general merits, or general conditions, of muzzle-pivoting, however, once in doubt at first, these are admitted now by all; and the latter resolve themselves almost into this--that system of muzzle-pivoting must be best which, while preserving the essential point of leaving the muzzle of the gun free of any direct attachment, i.e., with an imaginary, not an actual, pivot of vertical arc motion, shall be _the simplest possible_ in its parts, have the least details, the fewest parts capable of being struck by splinters or shot, and all its parts of such materials and character as to receive the smallest amount of injury if so struck. In every one of these aspects Herr Gruson's mounting is at fault. With parts and movements far more ingeniously adapted than those of the crude and unskillfully designed muzzle-pivoting carriages of Captain Heathorn, also exhibited at Paris, and much exhibited and exposed since, the Gruson mounting is even more complicated, expensive, and liable to injury of every sort to which a gun carriage can be conceived liable. We may even venture to affirm that ponderous as was the mass of cast iron, etc., in the Paris model carrying only a 12-pounder gun, were it all enlarged in such ratio as might appear to suit for a 10-inch 25-tun rifled gun of the British type, the almost proverbial relations, between weight, velocity of impulse, and brittleness of cast iron, would show themselves, in the whole machine going to pieces within a very few rounds.

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Stock Feeding by Clock Work.

Mr. F. B. Robinson, of North Haven, Conn., has invented a very neat arrangement, whereby horses or stock can be fed at any time required with certainty and without personal attention at the time of feeding. His invention consists of a hopper with a drop bottom in which the provender is placed. A latch secures the drop bottom, the latch engaging with a spring catch. A simple arrangement of clock work on the principle of the alarm clock, may be set to release the spring at any hour or minute desired, when the drop falls and the provender falls through a chute into the feeding trough. This invention may be adapted to feeding any number of horses or cattle, only one clock being required. We regard the invention as one of much value. By its use much neglect of careless attendants may be obviated, and a farmer without help, might leave home for an evening's entertainment, or absent himself on business, without fear that his stock would suffer. Besides being so convenient the cost of the apparatus is a mere bagatelle.

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Milk, and What Comes of It.

Orange County has long been a laud flowing with milk and--butter. Three or four of these most beautiful autumn days were spent by us, says a writer in _Harper's Weekly_, among the farmers which are supposed to butter our New York city bread, and qualify our tea and coffee. Recent mechanical improvements have taken away much of the traditional romance of the farm, but, on the whole, the loss is more than made up by the gain of perfect system and wonderful adaptation. Instead of four or five cows, known by such names as Brindle, Bess, and Sukey, milked by rosy-cheeked maidens, we have now droves of fifty or a hundred, milked by men, who know them only as "good" or "poor milkers."

In some fine farms a large and luxuriant pasture, with running brooks and border of woodlands, affords, with the herd feeding in it, a beautiful picture; and the substantial barns constructed to keep the cattle comfortably cool in summer and warm in winter, with ample drinking troughs and stalls for fastening up at night, are indicative of the good shelter at hand when winter storms drive the cows indoors. To the farmyards the cows are brought night and morning, in summer, to be milked. The strained milk is put into large cans holding forty quarts, such as the milkmen use in distributing it through the city. These cans are then put into tanks made in some cool running stream, where the water comes nearly to the top of the can. Frequent stirring is necessary until the animal heat is quite gone. The milk is then fit to be sent to the cars. This process can never safely be omitted for, paradoxical though it may seem, milk is "fresher" and sweeter when it reaches the consumer if it is delayed at the farm for at least twelve hours. Even in hot weather, it is more certain to keep sweet when twenty-four or thirty-six hours elapse between the milking and the using in the city.

There has been much discussion as to the best means of cooling milk for market, and patent pails have been tried in which the milk passes directly from the cow through small, coiled tubes surrounded by ice. But this rapid cooling does not work well, and practical experience indicates that the old simple process is the best. Every well-appointed farm must have, therefore, a cool and unfailing stream of water. There are two such streams in one of the farms we visited. One passes through the barn, furnishing drinking troughs for the cattle, and a tank for cooling milk in winter. The other, running through the pasture, supplies a trout-breeding pond, and furnishes a tank for summer use. In a little hut under the trees, the milk cans are kept in a stream, which even the severe drought of last summer did not dry, nor the heat raise to a temperature of 60°.

We are assured most positively that none of the spring water finds its way over the mouth of the can into the milk. Its dilution, of which there is so much just complaint, must be done, if at all, in the city, for the wholesale buyer is said to have such means of testing the milk as effectually protects him against the farmer. May the man be busy at work who is to give each family such a protection. We have heard it said that one end of a small piece of common tape placed in a pan of milk will carry from it all the water into another vessel in which the other end of the tape should be placed; but we have never found this a safe test.

Strange to say, no butter is made on these large milk farms. The supply for the family is obtained from market, or, more rarely, from a neighbor who churns all his milk for the accommodation of those who send all theirs to the city. Our notions of the way to make butter were decidedly overturned on going to such a dairy. No setting of the milk in shallow pans for cream to rise; no skimming and putting away in jars until "churning day," when the thick cream was agitated by a strong arm until the butter came, then worked and salted. Instead, there is a daily pouring of the unskimmed soured milk into a common churn, perhaps somewhat larger than ordinary. The dasher is fastened to a shaft, which is moved by a crank. The crank is turned by means of a nearly horizontal wheel some eight or ten feet in diameter, which is kept in motion by a dog, sheep, or calf standing on it, something after the manner of the old tread-mill.

When taken from the churn, the butter is worked by hand as of old. The farmer with whom we have talked said he was about determined to send his milk to the creamery, since butter-making made it so hard for the women. Surely woman is less a drudge than she used to be. If, after being relieved from the labor of churning, the remaining working of the butter is considered too hard for the farmer's wife, the day of a woman's redemption must be near at hand.

Only one butter farm, have we been able to find, and not enough is made there to supply the immediate neighborhood. Where, then, does all the Orange county butter come from? Mostly from the West. Farmers buy from the vicinity of the Alleghenies, and even further west, large quantities, which they sell in the original packages or repack in pails. Since railroads have become so numerous, New York drinks up all the milk in Orange county, and must butter her bread elsewhere.

The largest institution for the disposition of milk is the Creamery, which is, in other words, a cheese factory. Here is brought the milk which the farmers themselves are unable properly to prepare for market, for want of cool springs or sufficient help. Received here, it is placed in deep but narrow tin pails holding twelve or fourteen quartz. These are floated in large tanks of water. From these pails the cream is carefully taken and sent to market. The skimmed milk is then placed in a large vat and heated, by means of steam pipes to about 80°. Then the rennet is put in. From twenty to thirty minutes suffices for curdling, and the mass is then stirred to separate the curd from the whey. After which it is heated still more; and then the whey, passing off through a strainer, goes to feed hogs, while the curd remains in the vat, to be salted and worked before putting into the presses. In two or three hours the curds become hard enough for the canvas to be put upon them ready for the shelves. Very carefully they must then be watched, lest the fly lying in wait for them makes in them a snug house for her family. Greasing and turning must be a daily labor, and some weeks must pass before they are sufficiently cured for market.

For the benefit of city consumers, who are paying ten and twelve cents a quart for milk, from a tenth to a quarter of which is not infrequently pure Croton, we may add that the highest price the farmer ever gets for his milk is seven cents a quart; and he sometimes sells it for as low as two cents and a half. Our friends, the milkmen, have, therefore, it will be seen, a pretty good margin for freight and profit.

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Improved Hay Elevator.

The method most generally used for elevating hay is evidently not the most economical application of the power of horses for the accomplishment of the purpose desired. The tackle involves a great deal of friction, and as the quantity which can be thus raised at once is, probably, on the average, not more than from 150 to 200 lbs, much more time is employed in re-adjusting the fork, than would be the case if a larger quantity were elevated.

The invention under consideration supplies a means whereby it is claimed hay may be unloaded with far greater facility than heretofore, with less labor to the team and with fewer hands than are at present employed.

A primary gear wheel is propelled horizontally by a lever worked by a horse. The primary gear impels a pinion keyed to the shaft of a windlass, upon which is wound the elevating rope, whenever the clutch, A, is made to operate through the cord and lever, B. This cord runs over a pulley on the under side the wood framework at C, and its further end may be held in the hand of the workman on the hay load, who, when he has properly adjusted the fork, pulls the cord which operates the clutch, and the "fork-full" of hay is at once elevated. The cylinder of the windlass, not being keyed to the shaft, only operates when the clutch is closed by the cord.

The horse, or horses which furnish power to the machine, may, therefore, keep on traveling in the same direction, and no time is lost in stopping and backing, as in the method in general use.

There is no doubt but that this is a cheap, durable, and desirable machine, and one that can be used to great advantage, not only for the elevation of hay, but for many other purposes. We think it would be found a decided improvement in discharging cargoes of coal from barges, and for handling coal in storage yards.

The inventor claims that twice as much hay can be raised in a given time by its use, as can be done by the old method; and it dispenses with one hand at the barn or stack.

A coupling at D, enables attachments to be made, which extend the usefulness of the machine very much. It may be used as a power for driving wood saws, cutting fuel, thrashing, and other work where a simple horse power is desirable.

Address for further information, Wm. Derr, Tiffin, Ohio.

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COMPETITORS FOR PRIZES.--The interest that our friends have taken in obtaining additional names to send with their own subscriptions to the SCIENTIFIC AMERICAN for the coming year, is without a parallel. The clubs sent by competitors for the cash prizes are not so many or so large as we expected, but the number of applicants for the steel plate engraving exceeds our expectation.

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The Emperor of France is said to be interested in the art of flying and to have given money to fledge some inventions.

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IMPROVEMENT IN LAMP WICKS.

Our engravings show a novel substitute for the cotton lamp wick. The wick, two forms of which are shown in Figs. 1 and 2, are made of glass, and are filled preferably with pulverized gypsum, although any finely-ground stone, mineral, or metal may be employed. The bottom of the glass tube is closed by wire gauze, or other suitable strainer, through which the fluid flows; and is carried by the capillary attraction of the pounded material to the top of the wick.

Thus a permanent wick is obtained, which may be employed with any form of lamp, and will last for an indefinite time. It may also be used in connection with an open cup, which the inventor terms a poor man's lamp. A perforated card is laid upon the top of the cup or tumbler as a support to the wick.

It may be used either with or without a chimney, and it is claimed that with good kerosene oil it is perfectly safe, and consumes less of it, while it may be also used as a candle.

Patented through the Scientific American Patent Agency, September 14, 1869, by Edward D. Boyd, of Helena, Ark.