- Zulu Marimba
The Zulus, or more correctly the Amazulus, take the front `rank` amongst the native tribes of the African continent. Their code of laws, military arrangements, and orderly settlements resemble those of civilised nations at many points. Their dances are a national feature, and a great company of young warriors performing a solemn war dance is a most impressive sight. One of their chief instruments is the 'Marimba' or 'Tyanbilo,' a form of harmonium. The keys are bars of wood called Intyari, of graduated size. These are suspended by strings from a light wooden frame, either resting on the ground, or hung round the neck of the player. Between every two keys is a wooden bar crossing the centre bar to which the keys are attached. On each key two shells of the fruit known as the Strychnos McKenzie, or Kaffir Orange, are placed as resonators, one large and one small. The use of resonators is to increase and deepen the sound. The Marimba is played with drum-sticks of rubber, and the tone is good and powerful. - Zenith Telescope
Zenith Telescope constructed for the International Stations at Mizusawa, Carloforte, Gaithersburg and Ukiah, by Hermann Wanschaff, Berlin. - Yale 1910
- Wright Motor and Propellers
When the Wrights had built an engine, there was still the question how they should make it drive their aeroplane. They inclined naturally to the idea of an aerial propeller. Two courses lay open to them; they could fit one propeller running at high speed and coupled directly to the motor, or they could use two propellers, revolving at slower speed and geared in some way to the engine. They decided upon the latter course, placing two propellers behind the main planes of their machine and driving them from the engine by means of light chains, these running in guiding tubes. This system of propulsion is shown. A. Motor; B. Gear-wheels upon motor crank-shaft; C.C. Tubes carrying driving chains; D.D. Sprocket-wheels over which chains pass; E.E. Propellers. - Wright Launching Rail
A. Biplane; B. Rail; C. Rope passing from the aeroplane round the pulley-wheel (D.) and thence to the derrick (E.); (F.) Falling weight. Details of propulsion and control being arranged, there remained the question of how the machine should be launched into the air. In their gliding tests, it will be remembered, the Wrights employed assistants, who held the machine by the wing-tips and ran forward with it. But the weight of the power-driven machine, and its greater size, prevented such a plan as this. They decided, therefore, to launch it from a rail, and to aid its forward speed, at the moment of taking the air, by a derrick and a falling weight. - Workman fashioning a spectacle lens
- Woman using leeches
Woman using leeches, 17th century. (From Guillaume van den Bossche, Historica Medica, Brussels, 1639.) - Whistling bouy
Whistling bouy Less picturesque than lighthouses and lightships, and with far less of human interest about them, are the buoys of various sorts of which the Lighthouse Board has more than one thousand in place, and under constant supervision. Yet, among the sailor's safeguards, they `rank` near the head. They point out for him the tortuous pathway into different harbors; with clanging bell or dismal whistle, they warn him away from menacing shallows and sunken wrecks. The resources of science and inventive genius have been drawn upon to devise ways for making them more effective. At night they shine with electric lights fed from a submarine cable, or with steady gas drawn from a reservoir that needs refilling only three or four times a year. If sound is to be trusted rather than light, recourse is had to a bell-buoy which tolls mournfully as the waves toss it about above the danger spot, or to a whistling buoy which toots unceasingly a locomotive whistle, with air compressed by the Page 355action of the waves. The whistling buoy is the giant of his family, for the necessity for providing a heavy charge of compressed air compels the attachment to the buoy of a tube thirty-two feet or more deep, which reaches straight down into the water. The sea rising and falling in this, as the buoy tosses on the waves, acts as a sort of piston, driving out the air through the whistle, as the water rises, admitting more air as it falls. - Whale sending boat flying
Whale sending boat flying While the right whale usually takes the steel sullenly, and dies like an overgrown seal, the cachalot fights fiercely, now diving with such a rush that he has been known to break his jaw by the fury with which he strikes the bottom at the depth of 200 fathoms; now raising his enormous bulk in air, to fall with an all-obliterating crash upon the boat which holds his tormentors, or sending boat and men flying into the air with a furious blow of his gristly flukes, or turning on his back and crunching his assailants between his cavernous jaws. - Wet Cupping for a headache
Wet cupping for a headache. (From Frederik Dekkers, Exercitationes Practicae Circa Medendi Methodum, Leyden, 1694.) - Wendell Bollmans Patent Bridge
Patent Iron Suspension Railroad Bridge. The undersigned would inform the officers of Railroads and others, that he is prepared to furnish Drawings and Estimates for Bridges, Roofs, etc., on the plan of Bollman’s Patent. The performance of these bridges, some of which have been in use for six years, has given entire satisfaction. Their simplicity of construction renders repairs easy and cheap, and by a peculiar connection of the Main and Panel Rods at the bottom of the Posts, all danger from the effects of expansion, which has heretofore been the chief objection to Iron Bridges, is entirely removed. J. H. TEGMEYER, Baltimore, Md. - Waterfront
The Waterfront of New York - Washington's Coach
We must remember that travelling was no such simple and easy matter then as it is now. As the planters in Virginia usually lived on the banks of one of the many rivers, the simplest method of travel was by boat, up or down stream. There were cross-country roads, but these at best were rough, and sometimes full of roots and stumps. Often they were nothing more than forest paths. In trying to follow such roads the traveler at times lost his way and occasionally had to spend a night in the woods. But with even such makeshifts for roads, the planter had his lumbering old coach to which, on state occasions, he harnessed six horses and drove in great style. - W. D. Hooper’s patent cupping apparatus with tubular blades
W. D. Hooper’s patent cupping apparatus with tubular blades. (From patent specifications, U.S. patent no. 68985.) - Vultee L-1
Vultee L-1 Front Side Perspective Bottom Top - Vultee BT-15
Vultee BT-15 Front Side Perspective Bottom Top - Vultee BT-13
Vultee BT-13 Front Side Perspective Bottom Top - Vultee A-31
Vultee A-31 Front Side Perspective Bottom Top - Voisin Glider towed by a motor-car
In the launching of gliders, some French experimenters showed ingenuity. The brothers Voisin, for instance, who played a prominent part in the early tests in France, adopted the plan illustrated. The gilder was towed by a motor-car across an open stretch of ground; then, when its speed was sufficient for the planes to lift, it rose and flew behind the car like a kite. - Voisin Glider on the river Seine
A form of glider, mounted upon hollow wooden floats—anticipating the sea-plane of to-day—and towed upon the river Seine by a motor-boat. This gilder also, when its speed became sufficient, rose into the air. In the construction of the machine, a biplane, one notes resemblances to the method of the Wrights; and yet generally the craft is dissimilar. - Virginal
Virginal The instruments has mtal strings, one for each tone, whiched are twanged by means of small portions of quill, attached to slips of wood called "jacks" and provided with thin metal springs. German. About 1600 - Viola di Bardone
Viola di Bardone The finger-board is carved in open fret-work terminating in three lions' heads; above the bridge are two figures of negrose, carved and gilt. German 1686 - Viola da gamba
The player on the viola da gamba, shown in the engraving, is a reduced copy of an illustration in “The Division Violist,” London, 1659. It shows exactly how the frets were regulated, and how the bow was held. The most popular instruments played with a bow, at that time, were the treble-viol, the tenor-viol, and the bass-viol. It was usual for viol players to have “a chest of viols,” a case containing four or more viols, of different sizes. Thus, Thomas Mace in his directions for the use of the viol, “Musick’s Monument” 1676, remarks, “Your best provision, and most complete, will be a good chest of viols, six in number, viz., two basses, two tenors, and two trebles, all truly and proportionably suited.” The violist, to be properly furnished with his requirements, had therefore 119to supply himself with a larger stock of instruments than the violinist of the present day. - Vielle
The woodcut represents a very beautiful vielle; French, of about 1550, with monograms of Henry II. This is at South Kensington. The contrivance of placing a string or two at the side of the finger-board is evidently very old, and was also gradually adopted on other instruments of the violin class of a somewhat later period than that of the vielle; for instance, on the lira di braccio of the Italians. It was likewise adopted on the lute, to obtain a fuller power in the bass; and hence arose the theorbo, the archlute, and other varieties of the old lute. - Velocipedes
The article upon the Velocipede in the " American Encyclopedia," commences by giving the well-known derivation of the word from the Latin velox, swift, and pes, a foot, and defines it as a carriage, by means of which the rider propels himself along the ground, and states that it was invented at Manheim. - Velocipede for Ladies
We present a bicycle for ladies, lately invented and patented by Messrs. Pickering & Davis of New York City. It will be seen that the reach or frame, instead of forming a nearly straight line from the front swivel to the hind axle, follows the curve of the front wheel until it reaches a line nearly as low as the hind axle when it runs horizontally to that point of the hind wheel. The two wheels being separated three or four inches, allow of an upright rod being secured to the reach; around this is a spiral spring, on which a comfortable, cane-seated, willow-backed chair is placed. This machine, with a moderate-sized wheel (of thirty to thirty-three inches), will allow being driven with a great deal of comfort and all the advantages of the two-wheel veloce. In mounting, a lady has to step over the reach, at a point only twelve inches from the floor, the height of an ordinary step in a flight of stairs. - V1 Rocket
The German-developed V-1 was an automatically controlled pilotless aircraft for use against Allied cities during World War II. The missile was launched from ground ramps. Once in the air, automatic controls on board the craft took over. The V-1 climbed to a predetermined altitude, followed a compass course, and dove to the ground after a preset distance had been covered. This mid-wing monoplane was powered by a unique pulsejet engine above the rear portion of the fuselage. The relatively low speed of the missile made it easy prey for antiaircraft guns or fighters. - Using Bells phone
- United States Carriage model of 1896
United States Carriage model of 1896 - Tycho Brahe's House and Observatory
- Two early types of liquid-fuel, rocket motors.
Two early types of liquid-fuel, rocket motors. Left, the original ARS motor; right, a four-nozzle motor for ARS No. 4 rocket. Thrust stud for fastening to rocket Blast chamber Fuel feed Oxygen feed Nozzle Water jacket Nozzles Thrust and fuel column attached to rocket Fuel feed - Twine phones
The string telephones which for several years have been flooding the boulevards and the streets of the different cities of Europe, and whose invention dates back, as we have seen, to the year 1667, are very interesting apparatuses by them themselves, and we are astonished that they did not appear rather in the physics cabinets. They consist of cylindrical-conical tubes of metal or cardboard, one end of which is closed by a stretched membrane of parchment, in the center of which is fixed by a knot the string or cord intended to bring them together. When two tubes of this kind are thus joined together and that the wire is tight, as shown, it suffices for a person to apply one of these tubes against the ear and for another person to speak very close to the opening of the other tube, so that all the words spoken by the latter are immediately transmitted to the other, and one can even converse in this manner in an almost low voice. - Turn Signal
If you have to take a side road on the right, keep your arm stretched out in horizontal direction outside the car. [Translated online from the Dutch ] - Trepied
- trebuchet
The trebuchet was another war machine used extensively during the Middle Ages. Essentially, it was a seesaw. Weights on the short arm swung the long throwing arm. - Travelling workshop for the repair of military aeroplanes
There needs to be an equipment of spare machines also; and a number of travelling workshops with skilled engineers, which can be rushed from place to place for the repair of damaged craft. A sketch of one of these workshops on wheels, which are vital to the organisation, is seen in the figure - Tooting the sirens of warning
Air raid siren in Paris - Thirteenth-century hospital interior
Thirteenth-Century Hospital Interior (Tonerre) From “The Thirteenth: Greatest of Centuries,” by J. J. Walsh This was built by the sister of Louis IX of France, Marguerite of Bourgogne, who retired to it herself to spend her life caring for the ailing poor. - They swoop down over the trenches
British plane flying over the trenches in the great war - The Wright Wing-warp
Apart from governing the ascending or descending movement, there was the question of preventing a machine from slipping sideways; and this the Wrights solved ingeniously. They saw, of course, that when their glider lurched to one side or the other, they would need some power to tilt it back again. So they devised a system by which the plane-ends of their machine—being made flexible—might be warped, or caused to shift up and down. This action the operator controlled, as he lay across the lower plane, by a movement of cords, and its operation is shown in Figure. The effect upon the machine may be described thus: should a wind-gust tilt down one plane-end, the “warp” upon that side of the machine was drawn down also, and the effect of this—seeing that it caused the plane to assume a steeper angle to the air and exercise a greater lift—was to raise the plane-ends that had been driven down by the gust. By a system of connecting the control cords, this balancing influence was made to act with double force; when one wing warped down, the other moved up; and, in this way, while the side of the machine tilted down was made to rise, the other plane-ends, which had been lifted, were made to descend. A dual righting influence was thus obtained. This system, which imitates the flexing movements made by a bird, was an important device; the Wrights patented it—combining the movement with an action of the rudder—and brought cases at law to enforce their rights. - The Wright Brothers Aero Engine
The Wright Brothers Aero Engine - The Wright Biplane
A.A.—Main-planes; B. Double front elevator; C. Rudder (two narrow vertical planes); D. Motor; E. Propellers; F. Pilot’s lever; G. Skids upon which machine landed. It is now possible to describe, as a completed craft, the Wright power-driven plane; The picture shows its appearance; and in looking at it one is struck by the fact that, save for one or two modifications, and the fitting of motor and propellers, the machine is practically a glider, such as the Wrights used for soaring tests. Of the changes to be observed, the most interesting concern the elevator and rear-rudder. The former, it will be seen, has a double plane; it is, in fact, a smaller biplane on the principle of the main-planes. Needing to increase the surface of the elevator, the brothers fixed one plane above another so as to make the construction stronger and occupy less space. The rear-rudder, acting like that of a ship. - The Whaleback
The Whaleback Another form of lake vessel of which great things were expected, but which disappointed its promotors, is the "whaleback," commonly called by the sailors "pigs." These are cigar-shaped craft, built of steel, their decks, from the bridge aft to the engine-house, rounded like the back of a whale, and carried only a few feet above the water. In a sea, the greater part of the deck is all awash, and a trip from the bridge to the engine-house means not only repeated duckings, but a fair chance of being swept overboard. - The Voisin Biplane - top view
The Voisin Biplane - top view - The Voisin Biplane
At the beginning of 1909 there were two types of successful aeroplane—the Wright and the Voisin. Bleriot had flown with his monoplane and flown well; but he was still in the process of evolving a practical machine, and several other inventors were in a similar stage. It was the Wright and the Voisin which had proved their worth; and the Wright, as has been said, was the better of the two. Of the Voisin, as flown in 1909, a reproduction is given in the figure. It was a heavier aeroplane than the Wrights’, owing largely to the weight of its alighting gear (250 lbs.) and of its big balancing tail (more than 100 lbs.); hence the necessity for using a 50-h.p. motor, which drove a two-bladed metal propeller at the rate of 1200 revolutions a minute. The Voisin brothers, and other French makers, did not approve of the two-propeller system of the Wrights: they preferred one screw, revolving at high speed. But there was no doubt—at any rate in this stage of aviation—that the Wright method was more efficient than that of the Frenchmen. It was calculated, indeed, that the Wright biplane, when actually in the air, could be driven at an expenditure of only 15 h.p.; whereas the Voisin, even with its 50-h.p. motor running at full speed, had only just enough power to fly. A. Elevating plane B. Pilot’s seat C.C. Main-planes D. Engine and propeller E. Landing chassis F. Balancing tail G. Rudder. - The Vickers
Already, anticipating war in the air, a fighting aeroplane has been evolved; and a machine of this type is shown in Figure. The body, in which pilot and gunner sit, is armoured lightly with plates which will resist the penetration of a bullet. Such armouring was found necessary after the use of aeroplanes in Tripoli and the Balkans. When flying unavoidably low in these campaigns, and when fired at from the ground, the wooden bodies of machines were pierced by shot, and in several instances their occupants wounded. A fighting aeroplane A. Machine-gun projecting from opening in bow B. Gunner’s position C. Pilot’s seat D.D. Side windows for observation E. Engine and propeller. - The universe
The Universe (from the Heidelberg Codex of the Scivias) The scientific views of Hildegard are embedded in a theological setting, and are mainly encountered in the Scivias and the Liber divinorum operum simplicis hominis. To a less extent they appear occasionally in her Epistolae and in the Liber vitae meritorum. - The Treachourous Kayak
The Treachourous Kayak Mastering all the literature of the Arctic, he (Charles Hall) determined to undertake himself the arduous work of the explorer. Taking passage on a whaler, he spent several years among the Esquimaux, living in their crowded and fetid igloos, devouring the blubber and uncooked fish that form their staple articles of diet, wearing their garb of furs, learning to navigate the treacherous kayak in tossing seas, to direct the yelping, quarreling team of dogs over fields of ice as rugged as the edge of some monstrous saw, studying the geography so far as known of the Arctic regions, perfecting himself in all the arts by which man has contested the supremacy of that land with the ice-king. - The superstitious notions of the antients with regard to Eclipses
The superstitious notions of the antients with regard to Eclipses - The Solar System
By Astronomy we discover that the Earth is at so great a distance from the Sun, that if seen from thence it would appear no bigger than a point; although it’s circumference is known to be 25,020 miles. Yet that distance is so small, compared with the distance of the Fixed Stars, that if the Orbit in which the Earth moves round the Sun were solid, and seen from the nearest Star, it would likewise appear no bigger than a point, although it is at least 162 millions of miles in diameter. - The Snow. an obsolete type
The Snow. an obsolete type - The single-seated 'air-car'—a suggested type
A. Enclosed body B. Driver’s position C. Steering wheel D. Foot-controlled throttle lever for engine E.E. The two sustaining-planes F. The motor G. Propeller H. Rudder I. Elevating-plane J. Landing gear. First probably for mails, and after this for passenger-carrying, will aeroplanes of the future be employed; and they will find a scientific use, too, in exploring remote corners of the earth, and in passing above forests which are now impenetrable. Small, fast machines, much cheaper than those of to-day, will be bought also for private use—many of them, as suggested by the figure, having room for only one man within their hulls. Then there will be flying clubs; and to these, after their day’s work, will come a city’s toilers. Through the cheapening of craft, as time goes on, practically all members of the community will experience the joys of flight. Thus, say on a summer’s evening, the doors of the sheds will be pushed aside, and the machines wheeled out and overhauled; then, one by one, these small, fast-moving craft will rise into the air and dart here and there—circling, manœuvring, dipping, and diving. - The Shallop
- The seven-cylinder 50-h.p. Gnome motor.
The difficulty with air-cooling—although it had obvious advantages over water-cooling—was to bring enough air to play upon the surfaces of the cylinders; and it was here that the Gnome won so complete a success. In other engines the cylinders were stationary, and their pistons, moving up and down in the cylinders, turned a crank-shaft to the end of which the propeller was fixed. Therefore the only air the cylinders obtained was what rushed upon them through the speed of the machine in flight. But in the Gnome, instead of the cylinders remaining stationary and the crank-shaft revolving, the cylinders themselves spun round, and the crank-shaft did not move. An illustration of this motor with one end of the crank-chamber removed, so that the piston-rods can be seen, is given in the figure. It will be noted that there are seven cylinders, set in the form of a star, and that the seven piston-rods projecting from them come together upon a single crank-pin, which is attached to the stationary crank-shaft and turns round it. The propeller, instead of being fitted to the crank-shaft, as was the case with other motors, was bolted to a plate upon the engine itself, so that when this turned around its crank-shaft, it carried the propeller with it. - The seaplane shoots off the catapult
The seaplane shoots off the catapult - The Screw of Archimedes
- The Roe Triplane
An experimenter who braved this apathy and won his way until he became a constructor of aircraft, was Mr. A. V. Roe. For some time he was an advocate of the triplane form of machine—a craft, that is to say, with three main-planes fitted one above another. The machine with which he obtained flights, although they were very brief, is seen in the figure. Subsequently, however, Mr. Roe adopted the biplane form. His distinction in the pioneer days was that he managed to make his triplane lift into the air and fly a short distance, with the aid of a motor-cycle engine developing no more than 9 h.p. A.A.A. Three main-planes B. Motor C. Four-bladed propeller D.D.D. Triplane tail E. Rudder F. Landing gear. - The Rocket 1830
In 1830 all this had disappeared, and we find in Mr. Nasmyth's sketch a regular fire-box, such as is used to this moment. In one word, the Rocket of 1829 is different from the Rocket of 1830 in almost every conceivable respect; and we are driven perforce to the conclusion that the Rocket of 1829 never worked at all on the Liverpool and Manchester Railway; the engine of 1830 was an entirely new engine. - The Ptolemaic idea of the Universe
By the second century of the Christian era, the ideas of the early philosophers had become hardened into a definite theory, which, though it appears very incorrect to us to-day, nevertheless demands exceptional notice from the fact that it was everywhere accepted as the true explanation until so late as some four centuries ago. This theory of the universe is known by the name of the Ptolemaic System, because it was first set forth in definite terms by one of the most famous of the astronomers of antiquity, Claudius Ptolemæus Pelusinensis (100–170 a.d.), better known as Ptolemy of Alexandria. In his system the Earth occupied the centre; while around it circled in order outwards the Moon, the planets Mercury and Venus, the Sun, and then the planets Mars, Jupiter, and Saturn. Beyond these again revolved the background of the heaven, upon which it was believed that the stars were fixed— "Stellis ardentibus aptum," as Virgil puts it. - The Prison Ship 'Jersey'
The "Jersey" prison-ship was not an uncommon lot for the bold privateersman, who, when once consigned to it, found that the reward of a sea-rover was not always wealth and pleasure. The "Jersey," which had been originally a 74-gun ship, then cut down to a hulk and moored at the Wallabout, at that time a lonely and deserted place on the Long Island shore, now about the center of the Brooklyn river front.