THREE:The number of distinguished authors on miscellaneous subjects was very great at this time. In jurisprudence and political economy there were Jeremy Bentham, whose life ended in 1832; his eminent disciples, John Stuart Mill, Dr. Bowring, and Dr. Hill Burton; Archbishop Whately, Mr. M'Culloch, Mr. Sadler, and Mr. N. W. Senior. De Quincey began his brilliant career as an author in 1822, by the publication of "The Confessions of an English Opium-Eater."Iron suspension bridges were also introduced towards the end of this reign. Chain bridges had been erected in China for nearly two thousand years, and rope bridges in India and South America still earlier. In England a foot-bridge of iron chains was erected at Middleton, over the Tees, in the middle of the eighteenth century. In 1816 a bridge of iron wire was thrown across the Gala Water; and another, on a different principle, the following year, was erected over the Tweed, at[193] King's Meadows. But now much greater and more complete works of the kind were to be executed. Captain (afterwards Sir Samuel) Brown introduced many improvements into these structures. He substituted iron ropes for hempen ones, thereby forming cable-chains, like those used in Wales on quarry tram-roads, and these he applied to suspension bridges. In 1819 he was commissioned to construct an iron suspension bridge over the Tweed, near Kelso, called the union Bridge, which he completed in 1820, at a cost of five thousand pounds. In 1827 the first suspension bridge was thrown over the Thames by Mr. William Tierney Clarke; and in 1818 Telford commenced his great work of throwing a suspension bridge over the Menai Strait, near Bangor, which he completed in 1825. The main opening of this stupendous work is five hundred and sixty feet wide, and one hundred feet above high-water mark. The length of the roadway of the bridge is one thousand feet. The cost was one hundred and twenty thousand pounds. This was Telford's chef-d'?uvre. But the same neighbourhood was destined to see a more stupendous structure span the Strait from the Welsh shore to Anglesey. This was the tubular railway bridge, connecting the London and Holyhead line, within view of Telford's elegant suspension bridge. This was erected by Robert Stephenson, from his own design, greatly improved by suggestions from William Fairbairn of Manchester. It was completed in October, 1850, at a cost of six hundred and twenty-five thousand eight hundred and sixty-five pounds. Further description of this great work is not proper here, as it belongs to a later date, but it seemed fit to mention it in passing, as an evidence of the progress of the engineering science in the reign of Victoria.
Volunteer, Porshee Foundation
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