Mt. Stanford Gregorys Monument Mt. Ericsson Fri, Jun 8, 2007 With: Matthew Holliman		Etymology Mt. Stanford Mt. Ericsson	Story	Photos / Slideshow	Maps: 1 2	Profile

"John Ericsson invented the ship propeller and incorporated the landmark device into his design for the Civil War ironclad the Monitor.

Born in the Swedish province of Vermland, of educated parents, Ericsson first worked helping plan a Swedish canal. While working on the canal, he was tutored in math and the sciences.

He joined the Swedish army at age 17 and did topographical surveying. In 1826 he moved to London, where he showed the breadth of his engineering genius by developing or improving transmission of power by compressed air, new types of steam boilers, condensers for marine steam engines (so ships could travel farther), placing warship engines below the water line (for protection against shell fire), the steam fire-engine, the design and construction of a steam locomotive (which competed with the historic Rocket, the first steam powered locomotive), an apparatus that made salt from brine, superheated steam engines, the flame or 'caloric' engine.

His most enduring invention was the screw propeller, which is still the main form of marine propulsion.

Early methods of applying steam power at sea-steam-driven oars, paddle wheels-were inefficient and, for warships, vulnerable to enemy attack. In 1839 Ericsson introduced propellers to vessels on the canals and inland waterways and commenced building a 'big frigate' for the U.S. Navy.

He designed and built the Monitor for the Union Navy in 100 working days. It demonstrated its superior design-steam-propelled screw propeller, low in the water, a revolving gun turret, and iron construction rather than wood-by defeating the Confederate Merrimac."
- Inventure Place (online)