- 3.7-cm Pak
3.7-cm Pak - 30.12.2021 20.39.19 REC
- 5-cm Pak 38
- 8 cm Mortar Shell
- A One-hand catch
A One-hand catch - A perfect slide
A perfect slide - A Select Committee
- A Sharp Curve—Manhattan Elevated Railway, 110th Street, New York
Equally valuable improvements were made in cars, both for passengers and freight. Instead of the four-wheeled English car, which on a rough track dances along on three wheels, we owe to Ross Winans, of Baltimore, the application of a pair of four-wheeled swivelling trucks, one under each end of the car, thus enabling it to accommodate itself to the inequalities of a rough track and to follow its locomotive around the sharpest curves. There are, on our main lines, curves of less than 300 feet radius, while, on the Manhattan Elevated, the largest passenger traffic in the world is conducted around curves of less than 100 feet radius. There are few curves of less than 1,000 feet radius on European railways. - A Street in Yedo
A Street in Yedo (From a picture by Settan, 1783–1843) - A Switchback
Another American invention is the switchback. By this plan the length of line required to ease the gradient is obtained by running backward and forward in a zigzag course, instead of going straight up the mountain. As a full stop has to be made at the end of every piece of line, there is no danger of the train running away from its brakes. This device was first used among the hills of Pennsylvania over forty years ago, to lower coal cars down into the Nesquehoning Valley. It was afterwards used on the Callao, Lima, and Oroya Railroad in Peru, by American engineers, with extraordinary daring and skill. It was employed to carry the temporary tracks of the Cascade Division of the Northern Pacific Railroad over the "Stampede" Pass, with grades of 297 feet per mile, while a tunnel 9,850 feet long was being driven through the mountains. - Advancing, ... her clear eyes fixed on mine
- Amen-Ra, the King of the Gods
- An observation train
An observation train is often made up to follow the great college boat races, where the railroad runs along the river bank. Flat cars are used with seats fixed on them for the spectators. - An Odd Volume
A seated man reading a book - Ancienne Habitation à Bourges
- Ancienne Porte du Palais de Justice
- Ancient Greek
- And from that hour they were fast friends
- And still looked directly in my eyes
- Anne of Austria
engraved by W. Greatbach from a Print by Masson, after P. Mignard - Another good catch
Another good catch - Another great catch
Another great catch - Armes Symboliques de la Ville de Paris
- Asiatic Monarch
- Atys - the Phrygian shepherd
- Baby
- Bain-froid Chevrier
- Banked turn on a biplane
- Barrel and breech of 5-cm Pak
- Beginning a Tunnel
Tunnels are neither so long nor so frequent upon American railways as upon those of Europe. The longest are from two to two and a half miles long, except one, the Hoosac, about four miles. Sometimes they are unavoidable. The ridge called Bergen Hill, west of Hoboken, N. J., is a case in point. This is pierced by the tunnels of the West Shore, of the Delaware, Lackawanna, and Western, and of the Erie, the last two of which, are placed at different levels to enable one road to pass over the other. It is by our system of using sharp curves that we avoid tunnels. It may be said, in general terms, that American engineers have shown more skill in avoiding the necessity of tunnels than could possibly be shown in constructing them. When we are obliged to use tunnels, or to make deep cuttings in rocks, our labors are greatly assisted by the use of power-drills worked by compressed air and by the use of high explosives, such as dynamite, giant powder, rend-rock, etc. Rocks can now be removed in less than half the time formerly required, when ordinary blasting-powder was used in hand-drilled holes. - Behaim's Globe
- Black Cat Divider
- Blundell’s Impellor
A more general interest in the subject was revived in England by the work of James Blundell, lecturer on physiology and midwifery at St. Thomas’s and Guy’s Hospitals. He published in 1818 his earliest paper on experimental transfusion with a special form of syringe invented by himself. His first apparatus consisted of a funnel-shaped receptacle for the blood, connected by a two-way tap with a syringe from which the blood was injected through a tube and cannula into the recipient. His experiments were[11] performed upon dogs, and he began by drawing blood from the femoral artery and re-injecting it into the same animal through the femoral vein. He then conducted a long series of investigations into the properties of blood, the effects of its withdrawal, and the resuscitation of an exsanguinated animal. Soon he had opportunities of transfusing patients with human blood, and the results are recorded in his paper of 1824. His apparatus had by then been elaborated, and an engraving of his Impellor, as he termed it, is reproduced here. It consisted as before of a funnel-shaped receptacle for the blood, but the syringe was now incorporated in one side of the funnel, and contained a complicated system of spring valves, which caused the blood to travel along the delivery tube when the piston was pushed down. The Impellor was fixed to the back of a chair in order to give it stability. - Breech of 5-cm Pak
- Breech of 7.5-cm infantry howitzer
- Bródy Sándor
Bródy Sándor - Caravel , 15th Century
- Cardinal De Richelieu
Engraved by Bourgeois. - Cat looking up
- Cat watching a bug
- Caught Out
Caught Out - Charles Meryon, 1858. By Léopold Flameng
- Charles Meryon. By Félix Bracquemond
- Climbing the fence to catch the ball
Climbing the fence to catch the ball - Close-up of 75-round saddle-type drum
- Close-up of Luger pistol to show operation of extractor
- Collège Henri IV
- Concentrated charge made from stick grenades
- Construction of a Monoplane wing
- Cottage Piety
- Course of light in telescope from star to focus
For direct photography or visual observations at the focus of the 72-inch mirror, the reflected cone of star light from the mirror B, is intercepted by a plane mirror also silvered on the front surface, 19·5 inches diameter and 3·25 inches thick placed at 45°. This form of reflecting telescope was first used by Newton, hence the name. The focus is then formed, as shown, at the side of the tube, and if a plate is placed there and accurately guided by small eyepieces with cross wires, photographs of any desired small region in the sky can be obtained, or visual observations may be made. The oculars can easily be reached from the observing platform for any position of the telescope. - Cross Section of Luger pistol
- Cross section of magazine, trigger, and bolt mechanism of Mauser Kar. 98K rifle
- Cross-section of shaving-stick grenade
- Cute Kitten
- Demeter rejoiced for her daughter was by her side
So for six glad months each year Demeter rejoiced, for her daughter was by her side, and ever it was spring and summer while Persephone dwelt on earth. But when the time came for her to return to Hades, Demeter grew ever cold and sad, and the earth too became weary and grey. It was autumn and winter in the world until Persephone returned once more. - Diagram of Curtiss Aeroplane, side view
1. Motor; 2. Radiator; 3. Fuel Tank; 4. Upper Main Plane; 5. Lower Main Plane; 6. Aileron; 7. Vertical Rudder; 8. Tail Surface; 9. Horizontal Rudder, or Rear Elevator; 10. Front Elevator; 11. Vertical Fin; 12. Steering Wheel; 13. Propeller; 14. Foot Throttle Lever; 15. Hand Throttle Lever; 16. Foot Brake. - Diagram of Curtiss motor, side and front views
1. Cylinder; 2. Engine Bed; 3. Fuel Tank: 4. Oil Pan; 5. Radiator; 6. Propeller; 7. Crank Case; 8. Carbureter; 9. Gasoline Pipe; 10. Air Intake; 11. Auxiliary Air-pipe; 12. Drain Cock; 13. Water Cooling System; 14. Gas Intake Pipe; 15. Rocker Arm; 16. Spring on Intake Valve; 17. Spring on Exhaust Valve; 18. Exhaust Port; 19. Rocker Arm Post; 20. Push Rod. - Diagram of the Curtiss Flying Boat no. 2
A "No. 2 flying boat," just built by Mr. Curtiss, and successfully tested on Lake Keuka, Hammondsport, in July, 1912, is the "last word" in aviation so far. An illustration in this book, made from photographs taken in mid-July, 1912, shows fully the bullet-shape of the "flying fish." It is a real boat, built with a fish-shaped body containing two comfortable seats for the pilot and passenger or observer, either of whom can operate the machine by a system of dual control, making it also available for teaching the art of flying. All the controls are fastened to the rear of the boat's hull, which makes them very rigid and strong, while the boat itself, made in stream-line form, offers the least possible resistance to the air, even less than that offered by the landing gear upon a standard land machine. Above the boat are mounted the wings and aeroplane surface. In the centre of this standard biplane construction is situated the eighty horse-power motor with its propeller in the rear, thus returning to the original practice, as in the standard Curtiss machines, of having a single propeller attached direct to the motor, thus doing away with all chains and transmission gearing which might give trouble, and differing from the earlier model flying boat built in San Diego, California, last winter (1911-12), which was equipped with "tractor" propellors propellers in front driven by chains. The new flying boat is twenty-six feet long and three feet wide. The planes are five and a half feet deep and thirty feet wide. It runs on the water at a speed of fifty miles an hour, and is driven by an eighty horse-power Curtiss motor. At a greater speed than this it cannot be kept on the water, but rises in the air and flies at from fifty to sixty miles per hour. - Diagram Showing Adaptation to the 'Large-Wheeled Tractor' Idea
The genesis of the “large-wheeled tractor” was as follows: Trenches with a parados and parapet about 4 ft. high were being constructed by the enemy in Flanders. The engineers consulted by the Land Ship Committee gave it as their considered opinion that if these obstacles were to be crossed, a wheel of not less than 15 ft. diameter would be necessary. Machines with these gigantic wheels were actually ordered, but the wooden model that was knocked together as a preliminary at once convinced even its best friends that the design was fantastic, and that any machine of the kind would be little better than useless on account of its conspicuousness and vulnerability. However, the “big wheel” idea did not utterly die, for in the upturned snout of the Mark I. Tank we have, as it were, its “toe” preserved, the track turning sharply back at about axle level, instead of mounting uselessly skyward, as would have been the case had not the old wheel idea been supplanted by that of the sliding track.