- Rush For the gold fields
Rush For the gold fields - Edison with his Phonograph
Edison with his Phonograph In 1878 Mr Edison made a number of phonographs, which were exhibited in America and Europe, and attracted universal attention. The records were made in these on soft tinfoil sheets fastened around metal cylinders. For a while Mr Edison was compelled to suspend work on this invention, but soon returned to it and worked out the machine as it exists practically to-day. It occupies about the same space as a hand sewing-machine. A light tube of wax to slide on and off the cylinder is substituted for the tinfoil, which had been wrapped round it, and the indenting stylus is replaced by a minute engraving point. Under the varying pressure of the sound-waves, this point or knife cuts into the tube almost imperceptibly, the wax chiselled away wreathing off in very fine spirals before the edge of the little blade, as the cylinder travels under it. Each cylinder will receive about a thousand words. In the improved machine Mr Edison at first employed two diaphragms in 'spectacle' form, one to receive and the other to reproduce; but he has since combined these in a single efficient attachment. - La France
One of the largest sailing-ships afloat is the French five-master, La France, launched in 1890 on the Clyde, and owned by Messrs A. D. Bordes et Fils, who possess a large fleet of sailing-vessels. In 1891 she came from Iquique to Dunkirk in one hundred and five days with 6000 tons of nitrate; yet she was stopped on the Tyne when proceeding to sea with 5500 tons of coal, and compelled to take out 500 tons on the ground that she was overladen. - The Dandy-horse
The Dandy-horse of 1818, the two wheels on which the rider sat astride, tipping the ground with his feet in order to propel the machine, was laughed out of existence. - The Duke of Wellington
One of the 'Wooden Walls of Old England.' The Duke of Wellington Screw Line-of-Battle Ship. One hundred and thirty-one Guns. - Rifle-calibre Maxim Gun
Rifle-calibre Maxim Gun Its rate of firing—770 shots a minute—is at least three times as rapid as that of any other machine gun.
It has only a single barrel, which, when the shot is fired, recoils a distance of three-quarters of an inch on the other parts of the gun.
This recoil sets moving the machinery which automatically keeps up a continuous fire at the extraordinary rate of 12 rounds a second.
Each recoil of the barrel has therefore to perform the necessary functions of extracting and ejecting the empty cartridge,
or bringing up the next full one and placing it in its proper position in the barrel, of cocking the hammer, and pulling the trigger.
As long as the firing continues, these functions are repeated round after round in succession.
The barrel is provided with a water jacket, to prevent excessive heating;
and is so mounted that it can be raised or lowered or set at any angle, or turned horizontally to the left or to the right.
The bore is adapted to the present size of cartridges; and the maximum range is eighteen hundred yards.
The gun can therefore be made to sweep a circle upwards of a mile in radius. - Lord Armstrong
Armstrong, during the Crimean War, made an explosive apparatus for blowing up ships sunk at Sebastopol. This led him to turn his attention to improvements in ordnance. He invented a kind of breech-loading cannon, and soon had an order for several field-pieces after the same pattern. He began with guns throwing 6 lb. and 18 lb. shot and shells, and afterwards 32 lb. shells; and the results at the time were deemed almost incredible. He had both reduced the weight of the gun by one-half, reduced the charge of powder, and his gun sent the shell about three times farther. His success led to his offering to government all his past inventions, and any that he might in the future discover. A post was created for him, that of Chief Engineer of Rifled Ordnance for seven years provisionally. - Nordenfelt-Palmcrantz Gun mounted on Ship's Bulwark
Nordenfelt-Palmcrantz Gun mounted on Ship's Bulwark Machine guns have succeeded one another with extraordinary rapidity, and a gun seems only to be adopted in order to be superseded. Thus we have had during the last few years a series of these weapons bearing the names of Gatling, Gardner, Nordenfelt, and Maxim, - Gatling Gun on Field Carriage
Gatling Gun on Field Carriage These weapons are, as part of the regular equipment of armies, quite modern, though the idea of binding together a quantity of barrels and then discharging them at once, or with great rapidity one after another, is not altogether novel. Sometimes, instead of a number of barrels, one only is required, and the cartridges are discharged from short barrels or chambers which are brought in turn into position with the longer one. - The Great Harry
Some of the earliest three-deckers, or, as we may almost call them, five-deckers, were built at this dockyard; and of these the most famous was the Great Harry, so named after the king, which was launched here in 1514. For the period, the ship was a large one, being of a thousand tons burden; though we should not think much of her size now, when we have ironclads of over eleven thousand tons. There are models of her in the Greenwich Naval Museum, which is not far from Woolwich; and a curious lofty wooden castle she is, rising far up above the water-line, and offering a fair target, if the cannon of those days had any accuracy. - Prospecting for Gold
Prospecting for Gold - Wool-sorters at Work
Wool-sorters at Work In 1886 the pastoral wealth of the whole of the Australian colonies consisted of 84,222,272 sheep. At only ten shillings per head, this represents a capital of over forty-two millions sterling, without counting the value of the land. The number of sheep in 1894 was over 99,000,000. - Chinese Porcelain Vase
It was in 1751 that Dr Wall, a chemist and artist, completed his experiment in the combination of various elements, and produced a porcelain which was more like the true or natural Chinese porcelain than any ever devised. This was the more remarkable because kaolin had not then been discovered in this country. - Portland Vase
Portland Vase Wedgwood's copy of the Barberini or Portland Vase was a great triumph of his art. This vase, which had contained the ashes of the Roman Emperor Alexander Severus and his mother, was of dark-blue glass, with white enamel figures. It now stands in the medal room of the British Museum alongside a model by Wedgwood. It stands 10 inches high, and is the finest specimen of an ancient cameo cut-glass vase known. It was smashed by a madman in 1845, but was afterwards skilfully repaired. Wedgwood made fifty copies in fine earthenware, which were originally sold at 25 guineas each. One of these now fetches £200. The vase itself once changed hands for eighteen hundred guineas, and a copy fetched two hundred and fifteen guineas in 1892. - Wedgwood at Work
Wedgwood at Work He was bound apprentice to his brother Thomas in 1744, when in his fourteenth year; but this weak knee, which hampered him so much, proved a blessing in disguise, for it sent him from the thrower's place to the moulder's board, where he improved the ware, his first effort being an ornamental teapot made of the ochreous clay of the district. - Josiah Wedgewood
Josiah Wedgewood More than once it has happened that the youngest of thirteen children has turned out a genius. It was so in the case of Sir Richard Arkwright, and it turned out to be so in the case of Josiah Wedgwood, the youngest of the thirteen children of Thomas Wedgwood, a Burslem potter, and of Mary Stringer, a kind-hearted but delicate, sensitive woman, the daughter of a nonconformist clergyman. The town of Burslem, in Staffordshire, where Wedgwood saw the light in 1730, was then anything but an attractive place. Drinking and cock-fighting were the common recreations; roads had scarcely any existence; the thatched hovels had dunghills before the doors, while the hollows from which the potter's clay was excavated were filled with stagnant water, and the atmosphere of the whole place was coarse and unwholesome, and a most unlikely nursery of genius. - Krupp's 15.6 Breech-loading Gun (breech open)
Amongst the class of modern cannon, one of the most powerful is Krupp's seventy-one-ton gun. This, like all others of his make, is a breech-loader. Its dimensions are—length, thirty-two feet nine inches; diameter at breech end, five feet six inches; length of bore, twenty-eight feet seven inches; diameter of bore, 15.75 inches; diameter of powder-chamber, 17.32 inches. The internal tube is of two parts, exactly joined; and over this are four cylinders, shrunk on, and a ring round the breech. Its rifling has a uniform twist of one in forty-five. It cannot possibly be fired until the breech is perfectly closed. Its maximum charge is four hundred and eighty-five pounds of powder, and a chilled iron shell of seventeen hundred and eight pounds. - Bessemer Process
Sir Henry Bessemer says: 'It is this new material, so much stronger and tougher than common iron, that now builds our ships of war and our mercantile marine. Steel forms their boilers, their propeller shafts, their hulls, their masts and spars, their standing rigging, their cable chains and anchors, and also their guns and armour-plating. This new material has covered with a network of steel rails the surface of every country in Europe, and in America alone there are no less than 175,000 miles of Bessemer steel rails.' These steel rails last six times longer than if laid of iron.' - Bessemer Converting Vessel
a, a, a, tuyères; b, air-space; c, melted metal A very important development of the manufacture of steel followed the introduction of the 'Bessemer process,' by means of which a low carbon or mild cast-steel can be produced at about one-tenth of the cost of crucible steel. It is used for rails, for the tires of the wheels of railway carriages, for ship-plates, boiler-plates, for shafting, and a multitude of constructional and other purposes to which only wrought iron was formerly applied, besides many for which no metal at all was used. - Nasmyth's Steam-hammer
This machine enlarged at one bound the whole scale of working in iron, and permitted Maudsley's lathe to develop its entire range of capacity. The old 'tilt-hammer' was so constructed that the more voluminous the material submitted to it, the less was the power attainable; so that as soon as certain dimensions had been exceeded, the hammer became utterly useless. - Section of the Goubet Submarine Boat
The Goubet class are of iron, sixteen feet long, three feet wide, and about six feet deep. The motive power is a Siemens motor driven by storage batteries. Fifty of these boats were purchased by the Russian government. They have no rudder, but a universal joint in the screw shaft permits of the screw being moved through an arc of ninety degrees. The torpedo is carried outside the boat, secured by a catch worked from inside. On arriving under the enemy, the torpedo is released, and striking the ship's bottom, is held there by spikes. The boat then withdraws, unreeling a connecting wire; and when at a safe distance, fires. The absence of a rudder, however, causes erratic steering, and the spikes with which the torpedo is fitted might fail to stick in steel-bottomed ships.