406 MENAI BRIDGE. 



1826, and elsewhere, who has likewise shown 

 that the maximum extent of span for a cate- 

 narian curve in wrought iron would be several 

 miles, and dependent on the nature of the 

 catenary. 



The ratio of the span and versed sine above 

 would however be some what modified if the 

 weight were considered as uniformly distri- 

 buted along a horizontal road-way, for then 

 the curve would be a parabola. See paper on 

 Forms of the Catenary in this volume. 



