CONTEXTS.

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Example. — The Roadway upon Chains - Page 31The Data and Question Proper to be submitted in an En-quiry respecting the Thickness of the Bearers of aPendent Bridge, exemplified by that proposed to beerected over the Strait of Menai, and the Answer there-to 35

Table of Formulae - 35 *

To determine tire Extrados of Rebutment Piers, and con-cerning Bearing Piers for Pendent Bridges - 44

Geometrical Methods ok determining the RelationsBETWEEN THE P.-1RTS OF A CATENARY - 66

Mechanically - - - - 67

To Draw a Tangent - - - 68

All the Quantities except the Ordinate determined by aRight Angled Triangle - - 69

All the Quantities determined by a Right Angled Triangle,when the tension at the Point of Suspension is a Mini-mum in respect to the Ordinate - - 70

To determine Two Dissimilar Catenaries with the sameOrdinate, which have the same Tension at the Points ofSuspension - - - - 71

To draw a Catenary from the Catenary, where the Tensionat the Point of Suspension is a Minimum in respect tothe Ordinate - - - 72

To draw a Logarithmic Curve to a given Subtangent - 74

To draw a Catenary from an Equilateral Hyperbola anda Parabola - - - - 75

To find the Curve by the Evolution of which the Catenaryis described - - - - 77

To draw a Catenary from the Logarithmic Curve , and aLogarithmic Curve to a given Subtangent, by means ofthe Parabola and Hyperbola - - - 79

Method of Drawing a Curve , called by Frezier and Ron-delet, the Catenary - - - -81

To draw a Catenary to a given Absciss and Ordinate - 83