His work, 1827 to 1839, when he came to the United States.

"A spendthrift in invention;" versatility and daring.

The screw-propeller _vs_. the paddle-wheel for marine propulsion.

Designs and constructs the steam-frigate "Princeton" and the hot-air
ship "Ericsson".

The Civil War and his services in the art of naval construction.

His new model of a floating battery and warship, "The Monitor".

The battle between it and the "Merrimac" a turning-point in naval aspect
of the war.

"The Destroyer," built in connection with Mr. Delamater.

Improves the character and reduces friction in the use of heavy
ordnance.

Work on the improvement of steam-engines for warships.

Death, and international honors paid at his funeral.

His work in improving the motive-power of ships.

Special contributions to the art of naval war.

Ships of low freeboard equipped with revolving turrets.