[10] Tenth Report of the Commissioners of Naval Inquiry. See also Report of Select Committee on the 10th Naval Report. May, 1805.
[11] Mr. Mushet says of the early manufacture of iron at Merthyr Tydvil that "A modification of the charcoal refinery, a hollow fire, was worked with coke as a substitute for charcoal, but the bar-iron hammered from the produce was very inferior." The pit-coal cast-iron was nevertheless found of a superior quality for castings, being more fusible and more homogeneous than charcoal-iron. Hence it was well adapted for cannon, which was for some time the principal article of manufacture at the Welsh works.
[12] It may be worthy of note that the first locomotive run upon a railroad was that constructed by Trevithick for Mr. Homfray in 1803, which was employed to bring down metal from the furnaces to the Old Forge. The engine was taken off the road because the tram-plates were found too weak to bear its weight without breaking.
CHAPTER VIII.
THE SCOTCH IRON MANUFACTURE—DR. ROEBUCK DAVID MUSHET.
"Were public benefactors to be allowed to pass away, like hewers of wood and drawers of water, without commemoration, genius and enterprise would be deprived of their most coveted distinction."—Sir Henry Englefield.
The account given of Dr. Roebuck in a Cyclopedia of Biography, recently published in Glasgow, runs as follows:—"Roebuck, John, a physician and experimental chemist, born at Sheffield, 1718; died, after ruining himself by his projects, 1794." Such is the short shrift which the man receives who fails. Had Dr. Roebuck wholly succeeded in his projects, he would probably have been esteemed as among the greatest of Scotland's benefactors. Yet his life was not altogether a failure, as we think will sufficiently appear from the following brief account of his labours:—
At the beginning of last century, John Roebuck's father carried on the manufacture of cutlery at Sheffield,[1] in the course of which he realized a competency. He intended his son to follow his own business, but the youth was irresistibly attracted to scientific pursuits, in which his father liberally encouraged him; and he was placed first under the care of Dr. Doddridge, at Northampton, and afterwards at the University of Edinburgh, where he applied himself to the study of medicine, and especially of chemistry, which was then attracting considerable attention at the principal seats of learning in Scotland. While residing at Edinburgh young Roebuck contracted many intimate friendships with men who afterwards became eminent in literature, such as Hume and Robertson the historians, and the circumstance is supposed to have contributed not a little to his partiality in favour of Scotland, and his afterwards selecting it as the field for his industrial operations.
After graduating as a physician at Leyden, Roebuck returned to England, and settled at Birmingham in the year 1745 for the purpose of practising his profession. Birmingham was then a principal seat of the metal manufacture, and its mechanics were reputed to be among the most skilled in Britain. Dr. Roebuck's attention was early drawn to the scarcity and dearness of the material in which the mechanics worked, and he sought by experiment to devise some method of smelting iron otherwise than by means of charcoal. He had a laboratory fitted up in his house for the purpose of prosecuting his inquiries, and there he spent every minute that he could spare from his professional labours. It was thus that he invented the process of smelting iron by means of pit-coal which he afterwards embodied in the patent hereafter to be referred to. At the same time he invented new methods of refining gold and silver, and of employing them in the arts, which proved of great practical value to the Birmingham trades-men, who made extensive use of them in their various processes of manufacture.
Dr. Roebuck's inquiries had an almost exclusively practical direction, and in pursuing them his main object was to render them subservient to the improvement of the industrial arts. Thus he sought to devise more economical methods of producing the various chemicals used in the Birmingham trade, such as ammonia, sublimate, and several of the acids; and his success was such as to induce him to erect a large laboratory for their manufacture, which was conducted with complete success by his friend Mr. Garbett. Among his inventions of this character, was the modern process of manufacturing vitriolic acid in leaden vessels in large quantities, instead of in glass vessels in small quantities as formerly practised. His success led him to consider the project of establishing a manufactory for the purpose of producing oil of vitriol on a large scale; and, having given up his practice as a physician, he resolved, with his partner Mr. Garbett, to establish the proposed works in the neighbourhood of Edinburgh. He removed to Scotland with that object, and began the manufacture of vitriol at Prestonpans in the year 1749. The enterprise proved eminently lucrative, and, encouraged by his success, Roebuck proceeded to strike out new branches of manufacture. He started a pottery for making white and brown ware, which eventually became established, and the manufacture exists in the same neighbourhood to this day.