CONTENTS.

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EXAMPLES OF SPECIFICATiONS :

Requirements under Lloyd’s Rules, ... ... ... ... ... ... ... 939

1. Specification of a Screw Steamer of 1767 tons, ... ... ... ... ... 940

2. Specification of a Screw Steamer of 2000 tons b.m., ... ... ... ... 947

3. Specification of a Screw Steamer of 790 tons b.m., ... ... ... ... 949

4. Specification of a Screw Collier of 1500 tons b.m., ... ... ... ... 954

Dimensions of Masts, Spars, &c., for a Vessel similar to No. 3 Specification, ... 956

Examples of Scantling:

Scantling for a Clyde River Boat, 225 feet keel, ... ... ... ... ... 957

Scantling for a Clyde River Boat, 154^ feet keel, ... ... ... ... 958

Scantling for a small River Boat on the Thames, ... ... ... ... ... 958

Scantling for a small Paddle Steam Vessel of Steel, .959

Scantling for a Dredger, ... ... ... ... ... ... ... ... 959

Scantling for Mud Barges, ... ... ... ... ... ... ... ... 960

Steel for Shipbuilding. Constituents of Iron and Steel—Manufactuve of Steel—The Siemens, Bessemer, and Thomas-Gilchrist Processes—Dr. Siemens onIron and Steel Ships—Corrosion of Iron and Steel Plates—Tables of theWeight and Volumes of Iron , Steel, and other Metals—Tetnpering of SteelTools—Admiralty Tests for Plate, Angle, Bulb, and Bar Steel—Lloyd’sand Underwriters’ Registry Tests for Steel used in Shipbuilding, ... ... 960

ENGINEERING WORKS, Etc.

CONSTRUCTION OF FLOATING ÜOCKS :

Description of two Floating Docks, and Scantling, ... ... ... ... 967

Navigable Floating Dock and Battery, designed by the Autlior, ... ... ... 973

CONSTRUCTION OF IRON ROOFS :

Strains on a Plain Truss—Covering for Iron Roofs—Roofing for Boiler Houses, 975Strains on an Arched Truss—Arched Roofs—Roof of South-Eastern RailwayStation, Cannon Street, London —Roof of St. Pancras Railway Station,London —Roof of the Great Northern Railway Station, London —Roof of the

Joint Railway Passenger Station, New Street, Birmingham —Roof of St.Enoch Railway Station, Glasgow, ... ... ... ... ... ... 981

Table of the Scantling of Iron Roofs, ... ... ... ... ... ... 994

Tables of the Size and Weight of Iron Laths, and Weight of Roof Coverings, ... 996

Strains on Wrougiit-iron Girders, &c.:

Strains on Girder of I Section, .996

Cantilevers, ... ... ... ... ... ... ... ... ... .. 999

Professor Rankine on Action upon Beams, ... ... ... ... ... ... 1001

CONSTRUCTION OF GlRDER BRIDGES :

Examples of such Bridges with Roadways at top or bottom—Breaking Weightfor Wrought-iron Box Girders—Strain on Top and Bottom Flanges—CrumlinViaduct—Tubulär Girders—Conway and Britannia Bridges in Wales and

Victoria Bridge in Canada —Bowstring Girder—Bridge over the Elbe, ... 1002Plating Girders, ... ... ... ... ... ... ... ... ... 1006

Drilling the Plates, ... ... ... ... ... ... ... ... ... 1007

Scantling and Weight of Railway Bridges erected on the Plain-girder Principle, 1007CONSTRUCTION OF LATTICE GlRDER BRIDGES:

Principles of Construction, .1011

Details of Construction—Example of a Trellis Girder Bridge, ... ... ... 1015