William Wheelright and Early Steam Navigation in the Pacific 1820-1840
William Wheelwright, an American merchant-mariner and entrepreneur from Massachusetts, was the successful pioneer of commercial steam navigation in the Pacific in 1840 but, as is frequently the case, his predecessors prepared the way. Steam powered the Industrial Revolution from the late eighteenth century, and was soon applied to the movement of ships. Practical steam navigation on sheltered inland waters or open oceans depended upon James Watt's development of the steam engine from 1769 to 1782, including such improvements as the use of expansive steam, external condensers which reduced the loss of heat and power, and double-acting pistons. Inventors quickly adapted the new power mechanism to boats.