THE STORY OF THE FORTH BRIDGE.

The Firth of Forth.

How People Crossed it in Former Times.

Barren Schemes for Tunnelling—

And Bridging the Forth.

Sir Thomas Bouch's Designs.

The Final Scheme.

Meaning of "Cantilever."

Dimensions of the Bridge.

The Cantilevers.

Suspended Girders.

The Approaches.

Why the Present Site was Chosen.

The Three Towers.

Work Commenced.

Measuring Operations.

Work on Shore.

The Queensferry Jetty.

The Circular Piers.

Use of Open and Hydraulic Caissons.

Soundings for the Inchgarvie Foundations.

Sinking an Inchgarvie South Caisson.

Use of Compressed Air.

The Queensferry Caissons.

The Caissons Floated into Position.

A Mud Ejector.

A Hydraulic Spade for Cutting Clay.

An Accident to a Caisson.

Filling up the Air-Chambers.

The Granite Piers.

The Lower Bed-Plates.

Facts and Figures.

"Skewbacks."

Provisions for Expansion of the Metal.

Keyplates.

Preparing the Giant Tubes.

Erection of the Steelwork begun.

Movable Flatforms for the Towers.

Lifting a Platform.

Correcting the Inclination of the Columns.

The Final Elevation Reached.

Workshops in the Sky.

The Jubilee Cranes.

The Cantilevers Completed.

Details about their Extremeties.

A Clever Device.

Building the Central Girders.

Joining-up.

A Delicate Task.

A Dramatic Episode.

Ingenious Rail Joint.

L. S. D.

A Splendid Success.