The results were again satisfactory. The success of the Archimedes astonished the engineering world. Even the Surveyor of the Royal Navy found that the vessel could steer! The Lords of the Admiralty could no longer shut their eyes. But the invention could not at once be adopted. It must be tested by the best judges. The vessel was sent to Dover to be tried with the best packets between Dover and Calais. Mr. Lloyd, the chief engineer of the Navy, conducted the investigation, and reported most favourably as to the manner of her performance. Yet several years elapsed before the screw was introduced into the service. In 1840 the Archimedes was placed at the disposal of Captain Chappell, of the Royal Navy, who, accompanied by Mr. Smith, visited every principal port in Great Britain. She was thus seen by shipowners, marine engineers, and shipbuilders in every part of the kingdom. They regarded her with wonder and admiration; yet the new mode of navigation was not speedily adopted. The paddle-wheel still held its own. The sentiment, if not the plant and capital, of the engineering world, were against the introduction of the screw. After the vessel had returned from her circumnavigation of Great Britain, she was sent to Oporto, and performed the voyage in sixty-eight and a half hours, then held to be the quickest voyage on record. She was then sent to the Texel at the request of the Dutch Government. She went through the North Holland Canal, visited Amsterdam, Antwerp, and other ports; and everywhere left the impression that the screw was an efficient and reliable power in the propulsion of vessels at sea. Shipbuilders, however, continued to "fight shy" of the screw. The late Isambard Kingdon Brunel is entitled to the credit of having first directed the attention of shipbuilders to this important invention. He was himself a man of original views, free from bias, and always ready to strike out a fresh path in engineering works. He was building a large new iron steamer at Bristol, the Great Britain, for passenger traffic between England and America. He had intended to construct her as a paddle steamer; but hearing of the success of the Archimedes, he inspected the vessel, and was so satisfied with the performance of the screw that he recommended his directors to adopt this method for propelling the Great Britain. His advice was adopted, and the vessel was altered so as to adapt her for the reception of the screw. The vessel was found perfectly successful, and on her first voyage to London she attained the speed of ten knots an hour, though the wind and balance of tides were against her. A few other merchant ships were built and fitted with the screw; the Princess Royal at Newcastle in 1840, the Margaret and Senator at Hull, and the Great Northern at Londonderry, in 1841.