It was he, moreover, who proposed the flash-light for lighthouses, as a means by which seamen might identify lighthouses. He proposed that a powerful light should be made by periodic flashes to correspond with the number of the lighthouse, and that every lighthouse along the coast should have a registered number, so that the number of flashes per minute should represent the lighthouse.
Gurney was present at Sir W. Snow Harris's experiment on Somerset House terrace with wire for ships' lightning-conductors. Turning to Sir Anthony Carlisle, in reference to the magnetic needle which, as he observed, made starts on meeting the poles of a galvanic battery, he said with the inspiration of genius, "Here is an element which may, and I foresee will, be made the means of intelligible communication."
Whilst engaged at the Surrey Institution he invented the oxyhydrogen blow-pipe. Before this was introduced the risk of accident was so great that recourse was seldom had to oxyhydrogen.
Gurney applied his steam-jet to other purposes than propelling locomotives and exciting the ardour of furnaces in ironworks. By its means he extinguished the fire of a burning coal-mine at Astley, in Lancashire, and in 1849 another at Clackmannan, where the bed of coal had been burning for over thirty years. He also employed it for expelling noxious gases from sewers, and planned and superintended in 1849 the ventilation by this means of the pestilential sewer in Friar Street, London, which resisted all other efforts to cleanse it; and he suggested to the metropolitan commissioner of sewers that a steam-jet apparatus should be placed at the mouth of every sewer emptying into the great main sewer by the Thames river-side.
He was employed on the lighting, heating, and ventilation of the old House of Commons, and he held the appointment of superintendent of these functions from 1854 to 1863.
He had remarked that the flame of hydrogen gas caused vibrations that produced musical tones, and in 1823 wrote on "the analogy between chemical and musical combinations." He suggested "an improved finger-keyed musical instrument, in the use of which a performer is enabled to hold or prolong the notes, and to increase or modify the tone at pleasure." In 1825 and 1833 he proposed "certain improvements in musical instruments." He invented a stove, and saw and advocated the advantage of the employment of circulation of hot water for the heating of a building. He advocated the employment of concrete for foundations where there was no rock, and to show that it was possible to build a house upon the sand, he reared the castle at Bude upon concrete floated into the shifting sand above high-water mark. He again was the first to point out and insist on the necessity for there being two shafts to every colliery, so as to maintain a circulation of air.
For several years Mr. Gurney resided at Hanacott Manor, near Launceston, but he had also a house at Reeds, in Poughill by Bude, and the castle at the latter place, which is usually let. He was knighted in 1863—a tardy acknowledgment of his great services and extraordinary ability. The honour came too late to really advantage him. That same year he was stricken with paralysis, and therefore could do nothing in the way of scientific research and invention. He was attended till his death by his only child, a daughter, Miss Anna D. Gurney. He expired at Reeds on the 28th February, 1875, and was buried at Launcells in the graveyard just under the south wall of the nave.
Like Henry Trengrouse, so with Sir Goldsworthy Gurney—a man of genius and perseverance, and one who benefited mankind, received no adequate recognition in his lifetime. May posterity do for him, as for Trengrouse, what his contemporaries denied him. Mr. Smiles vainly endeavoured to refuse to credit him with the invention of the steam-blast; but the writer of his life in the Dictionary of National Biography afforded him tardy justice. "One soweth and another reapeth" is true of all inventors with few exceptions. How much do we owe to Sir Goldsworthy! He was the pioneer of locomotion by motors on our roads, the salvation of many lives by the ventilation of coal-mines; he invented the system of heating mansions by hot water, the flash-light for lighthouses, the steam-blast revolutionizing locomotion by steam; he showed that houses could be built on concrete foundations; he discovered the limelight, the oxyhydrogen blow-pipe: and he was repaid with a barren knighthood when about to be struck down by paralysis.
For his bounty,
There was no winter in't; an autumn 'twas,
That grew the more by reaping.
Antony and Cleopatra, v. 2.