XVI

CONTENTS.

The Eighth Column of the Tables of Brill ges may be ap-plied as a Measure of the Science displayed, of theQuantity of Material used, and of the Money expendedin the Erection of a Bridge - - Page 20

Table I. — Of Stone and Brick Bridges - - 21

Table II. — Of Wooden Bridges - 24

Table III. — Of Iron Bridges - - 25

Substance of the Report from the Select Committee of theHouse of Commons, determining the Standards ofLength, Capacity, and Weight - - 26

Table of Measures of different Nations - - 31

Table of Weights of do. do. - - 32

Table of the Strength of Materials and Moduli of Fracture 33Application of the Formulas derived from the Principlesof Pendent Bridges to insistent Bridges - - 37

Of the Limit of Weight which a Bridge ought to sustain 41Examples of Stone, Brick, Wood, and Iron Bridges - 43

Examples : Holy Trinity, Florence, Neuilli, Waterloo,and Dunkeld Bridges - - - - 44

--Tete, Picardy ; and Bamberg , Germany - 46

■--- Southwark and Menai Bridges - - 48

Abstract, shewing the weight at the vertex - - 49

Geometrical Problems to determine the Ratio of theParts of Posts, Piers, and Walls, and of Beams , Lin-tels, and Arches - ■■ -

To describe a Logarithmic Curve - - - - 51

To describe the Catenary of Equal Strength at every Point 52To draw a Line at Right Angles to the Tangent to theIntrados - - - - - 54

To find the Intrados, &c. when a Horizontal Line - z'A

- : --— when a Vertical Line - 55

To determine the Battering, in the Case of a Pier - ib.

■ -•-- in the Case of a Wall - 56

To determine the Depth at every Part of a Beam - ib.

To determine the Section of an Abutment Wall, con-sidered as a Strutt - - - 57