Engineering

Ramjet

aviation

Johnson, Kelly

American aeronautical engineer

Stephenson, Robert

British engineer

Stevens, Robert Livingston

American engineer

Roberts, Richard

British inventor

Ericsson, John

Swedish-American engineer

Ruhmkorff, Heinrich Daniel

German inventor

Griffiths, John Willis

American naval architect

Rustication

architecture

Epitaxy

crystallography

Broaching Machine

Solar Water Heater

technology

Cornu, Paul

French engineer

Shaduf

irrigation device

Sommeiller, Germain

French engineer

Air-conditioning