How Horatius kept the bridge

Horatius

How Horatius kept the bridge

"View of Bagdad." — Goodrich, 1844

Ancient Bagdad

"View of Bagdad." — Goodrich, 1844

The East River suspension bridge of New York City.

East River

The East River suspension bridge of New York City.

A physicist and author, born in Leighlin Bridge, Ireland, Aug. 21, 1820; died in Haslemere, England, Dec. 4, 1893.

John Tundall

A physicist and author, born in Leighlin Bridge, Ireland, Aug. 21, 1820; died in Haslemere, England,…

This illustration shows a bridge leading in to the town of Saragossa, Spain. Saragossa is a city famous for holding invaders during numerous wars.

Saragossa

This illustration shows a bridge leading in to the town of Saragossa, Spain. Saragossa is a city famous…

A bridge which may be drawn up or let down to admit or hinder communication, or to leave a transverse passage free.

Draw Bridge

A bridge which may be drawn up or let down to admit or hinder communication, or to leave a transverse…

The suspension bridge connecting New York with Brooklyn.

Suspension Bridge

The suspension bridge connecting New York with Brooklyn.

The bridge accross the Mississippi at St. Louis.

St. Louis Bridge

The bridge accross the Mississippi at St. Louis.

Old Mexican bridge near Tezcuco.

Mexican Bridge

Old Mexican bridge near Tezcuco.

The old London Bridge.

London Bridge

The old London Bridge.

The new London Bridge.

London Bridge

The new London Bridge.

The Waterloo Bridge.

Waterloo Bridge

The Waterloo Bridge.

The Southwark Bridge.

Southwark Bridge

The Southwark Bridge.

Illinois and St. Louis Bridge.

Illinois Bridge

Illinois and St. Louis Bridge.

Britannia Tubular Bridge.

Britannia Bridge

Britannia Tubular Bridge.

Menai Suspension Bridge.

Menai Bridge

Menai Suspension Bridge.

High Level Bridge, Newcastle.

Newcastle Bridge

High Level Bridge, Newcastle.

Crumlin Viaduct, South Wales.

Crumlin Viaduct

Crumlin Viaduct, South Wales.

Niagara Suspension Bridge.

Niagara Bridge

Niagara Suspension Bridge.

"One of the earliest examples of the castle built to protect the bridge against an enemy or to enforce payment of a toll, the bridge and castle of medieval romance." — Encyclopedia Britanica, 1893

St. Chamas Bridge

"One of the earliest examples of the castle built to protect the bridge against an enemy or to enforce…

"A strange triangular bridge at Croyland was probably built for or by a religious body. This structure stands at the confluence of the Welland, the Nyne, and the Catwater drain; three pointed arches, having their abutments at the angles of an equilateral triangle, meet in the middle, giving three watercourses and three roadways." — Encyclopedia Britanica, 1893

Croyland Bridge

"A strange triangular bridge at Croyland was probably built for or by a religious body. This structure…

"The old bridge at Saintes as M. Violletle-Duc considers that it appeared towards the end of the 14th century." — Encyclopedia Britanica, 1893

Saintes Bridge

"The old bridge at Saintes as M. Violletle-Duc considers that it appeared towards the end of the 14th…

"The covered bridge over the Ticino at Pavia was erected, under Gain Galeazzo Visconti, about the end of the 14th century. This bridge, which still exists, has seven pointed brick arches, each 70 feet in span and 64 feet in height; the depth of the arch ring at the crown is 5 feet, 6 inches." — Encyclopedia Britanica, 1893

Ticino Bridge

"The covered bridge over the Ticino at Pavia was erected, under Gain Galeazzo Visconti, about the end…

"The old bridge of Brioude across the Allier in France. Montfaucon and Seguin speak of this as a Roman work, but Gauthey gives the date 1454 for its construction, and names Grenier and Estone as builders without giving his authority." — Encyclopedia Britanica, 1893

Brioude Bridge

"The old bridge of Brioude across the Allier in France. Montfaucon and Seguin speak of this as a Roman…

"The bridge of the Rialto at Venice was begun in 1588, Antonio da Ponte being the architect. The span of the arch is 91 feet, the height above the water level 24 feet 6 inches, and the width of the footway 72 feet." — Encyclopedia Britanica, 1893

Rialto Bridge

"The bridge of the Rialto at Venice was begun in 1588, Antonio da Ponte being the architect. The span…

"The beautiful "Ponte della Trinita," erected at Florance in 1566 from the designs of Ammanati." — Encyclopedia Britanica, 1893

Ponte della Trinita

"The beautiful "Ponte della Trinita," erected at Florance in 1566 from the designs of Ammanati." —…

"A fine bridge over the Ouse at York, erected in the reign of Queen Elizabeth, was taken down some years ago. The span of the largest arch was 81 feet, and the rise 26 feet 3 inches." — Encyclopedia Britanica, 1893

York Bridge

"A fine bridge over the Ouse at York, erected in the reign of Queen Elizabeth, was taken down some years…

"The bridge over Conway at Llanrwst in Wales, the design for which was furnished by Inigo Jones in 1634. The middle arch has a span of 58 feet. The structure is easily set in vibration, and is known as the 'shaking bridge.'" — Encyclopedia Britanica, 1893

Llanrwst Bridge

"The bridge over Conway at Llanrwst in Wales, the design for which was furnished by Inigo Jones in 1634.…

"The Pont-y-ru-Prydd goes over the River Taff near Newbridge. The arch measures 140 feet between the abutments, and has a rise or versed sine of 35 feet. The width of the soffit is 15 feet 10 inches at the springing, diminishing to 14 feet 5 inches at the crown by six offsers." — Encyclopedia Britanica, 1893

Pont-y-tu-Prydd

"The Pont-y-ru-Prydd goes over the River Taff near Newbridge. The arch measures 140 feet between the…

"The elevation of Bowstring Arch, High-Level Bridge, Newcastle." — Encyclopedia Britanica, 1893

Bowstring Arch

"The elevation of Bowstring Arch, High-Level Bridge, Newcastle." — Encyclopedia Britanica, 1893

"Plan of High-Level Bridge, Newcastle." — Encyclopedia Britanica, 1893

Bridge Plans

"Plan of High-Level Bridge, Newcastle." — Encyclopedia Britanica, 1893

"The best method for comparing resistances with great accuracy is the modification of Wheatstone's bridge introduced by Kirchhoff. KL is a platinum-iridium wire, DK and HL are stout copper terminals to which it is soldered, DAE, EGH, FBS are stout copper pieces with binding screws and terminals for mercury cups, by means of which resistances R, T, U, S can be inserted at D, E, F, H. A, B, and G are binding screws for the battery wires and one end of the galvanometer wire." — Encyclopedia Britannica, 1893

Wheatstones Bridge

"The best method for comparing resistances with great accuracy is the modification of Wheatstone's bridge…

"Tentaculocyst and marginal lappets of Aurelia aurita. In the lefthand figure-ML, marginal lappets; T, tentaculocyst; A, superior or aboral surface, magnified about 50 diameters. In the right-hand figure-A, superior or aboral olfactory pit; B, inferior or adoral olfactory pit; H, bridge between the two marginal lappets forming the hood; T, tentaculocyst; End, endoderm; Ent, canal of the enteric system continued into the tentaculocyst; Concendodermal concretion; oc, ectodermal pigment (ocellus). The drawing represents a section, taken in a radial vertical plane so as to pass through the long axis of the tentaculocyst." — Encyclopedia Britannica, 1893

Aurelia Aurita

"Tentaculocyst and marginal lappets of Aurelia aurita. In the lefthand figure-ML, marginal lappets;…

A device used to measure an unknown resistance of a resistor by balancing two legs of a bridge circuit.

Wheatstone Bridge

A device used to measure an unknown resistance of a resistor by balancing two legs of a bridge circuit.

"The general arrangement of a puddling furnace; a is the charging door for the fuel, d the bridge with an air course to cool it, c the bed supported on iron plates with air courses under them, f the exit flue leading to the chimney stack, which is surmounted with a damper k worked by a chain i from within the shen in which the forge is placed; b is the ashpit, g the slag-hole, and e the working door suspended by a chain from a lever with the counterpoise attached h, resting on the front side of the furnace roof." — The Encyclopedia Britannica, 1893

Puddling Furnace

"The general arrangement of a puddling furnace; a is the charging door for the fuel, d the bridge with…

"The general arrangement of a puddling furnace; a is the charging door for the fuel, d the bridge with an air course to cool it, c the bed supported on iron plates with air courses under them, f the exit flue leading to the chimney stack, which is surmounted with a damper k worked by a chain i from within the shen in which the forge is placed; b is the ashpit, g the slag-hole, and e the working door suspended by a chain from a lever with the counterpoise attached h, resting on the front side of the furnace roof." — The Encyclopedia Britannica, 1893

Puddling Furnace

"The general arrangement of a puddling furnace; a is the charging door for the fuel, d the bridge with…

"Danks rotary Puddling Furnace. The feel is burnt in an ordinary fireplace, a blast B being admitted under the bars and another over them A, level with the firing hole, so that by regulating the two streams of air the atmosphere can be kept reducing or oxidizing at will. A circular chamber or drum C is supported on massive friction rollers and arranged so that its axis is about level with the top of the bridge; at the other end is a movable terminal shaped like the frustum of a cone D, supported by chains or rods from a crane so that it can be swung on one side if required, thus serving as a door." — The Encyclopedia Britannica, 1893

Danks Furnace

"Danks rotary Puddling Furnace. The feel is burnt in an ordinary fireplace, a blast B being admitted…

"a, a, a, represents the water-level of a pond or reservoir upon elevated ground. From this pond a line or pipe is laid, passing over a bridge or viaduct at d, and under a river at c. The fountains, at b, b, show the stream rising to its level in the pond, a, at two points of very different elevation." — Wells, 1857

Water Level

"a, a, a, represents the water-level of a pond or reservoir upon elevated ground. From this pond a line…

A galloway boiler, section beyond the bridge.

Boiler

A galloway boiler, section beyond the bridge.

A diagram of Trajan's bridge

Trajan's Bridge

A diagram of Trajan's bridge

A diagram of Ponte Salario Bridge

Ponte Salario Bridge

A diagram of Ponte Salario Bridge

A diagram of Schaffhausen Bridge

Schaffhausen Bridge

A diagram of Schaffhausen Bridge

A diagram of Alcantara Bridge

Alcantara Bridge

A diagram of Alcantara Bridge

A diagram of Crowland Bridge

Crowland Bridge

A diagram of Crowland Bridge

A diagram of Old London Bridge

Old London Bridge

A diagram of Old London Bridge

A diagram of Ponte della Trinitia Bridge

Ponte della Trinitia Bridge

A diagram of Ponte della Trinitia Bridge

The London New Bridge

London New Bridge

The London New Bridge

The London Bridge

London Bridge

The London Bridge

The Menai Suspension Bridge

Menai Suspension Bridge

The Menai Suspension Bridge

The Niagra Suspension Bridge

Niagra Suspension Bridge

The Niagra Suspension Bridge

The Williamsburg Bridge in New York

Williamsburg Bridge

The Williamsburg Bridge in New York

The Tower Bridge in London

Tower Bridge

The Tower Bridge in London

Cross section of Tubular Girder of the Britannia Bridge

Britannia Bridge

Cross section of Tubular Girder of the Britannia Bridge

The Britannia Bridge

Britannia Bridge

The Britannia Bridge

The Newark Dyke Bridge

Newark Dyke Bridge

The Newark Dyke Bridge

The Newark Dyke Bridge

Newark Dyke Bridge

The Newark Dyke Bridge

The Saltash Bridge

Saltash Bridge

The Saltash Bridge

The typical Cantilever Bridge

Typical Cantilever Bridge

The typical Cantilever Bridge

A bridge

Bridge

A bridge

The Forth Bridge

Forth Bridge

The Forth Bridge