1856 - unsuccessful trials of vertical boiler coils carried out in the ship, Biche. 1861 - further unsuccessful trials of vertical coils carried out in the ship, 'Sainte Barbe'. 1868 - US Patent application US82276 for a new and improved Spring-Regulator. 1872 - first appearance of the 'Belleville Boiler' using horizontal tubes in the high speed boat, 'Hirondelle'. 1900 - 'Belleville Boilers' adopted by the Royal Navy.