Technology

Elmen, Gustav Waldemar

American electrical engineer

Torsion Bar

mechanics

DirectX

Definition & Facts

Heat Pump

engineering

Senefelder, Alois

German lithographer

Ohain, Hans Joachim Pabst Von

German designer

Prazo

feudal estate

Day, Benjamin Henry

American journalist and publisher

Pine, John

English engraver

Evinrude, Ole

American inventor

Fleming, Sir John Ambrose

British engineer

List Of Computer Scientists

Prescribed Fire

History, & Benefits

Guano

excrement

Hydrophone

instrument

Parmentier, André

American horticulturalist