Francis Webb.

Beta 2 rocket engine, 1948-1953.

Design for a helicopter and tank, c 1490s.

Compound microscope, c 1676.

Hooke's compound microscope, 1665-1675.

Hooke's compound microscope, 1665-1675.

Hooke's compound microscope, c 1665.

Jonathan Hornblower's compound Engine, 1781.

French 4-6-0 compound locomotive no 3628, 1911.

Specimen of an intermetallic compound of copper and aluminium, 1925.

Marshall type compound microscope, late 17th-early 18th century.

Compound monocular microscope. European, c.1700.