Technology

Ironclad

ship

Ramjet

aviation

Propagation

of plants

Johnson, Kelly

American aeronautical engineer

Stephenson, Robert

British engineer

Mail

communications

Arboriculture

agriculture

Stevens, Robert Livingston

American engineer

Enclosure

European history

Velocipede

Bike, History, & Facts

Distance-measuring Equipment

instrument

Roberts, Richard

British inventor

Ericsson, John

Swedish-American engineer

Ruhmkorff, Heinrich Daniel

German inventor

Liquid Crystal Display

electronics

Tape Recorder

audio equipment