Magnetic Sundial, mid 18th century.

Landau carriage, mid 18th century.

Landau carriage, mid 18th century.

Steel lock, 18th century.

Tonsil guillotines, c 1850-1920.

Horseshoe magnet, 2000.

Horseshoe magnet, 2000.

Surveyor's level, mid 18th century, made by

Two pairs of spectacles, English, mid 18th-19th century.

Mathematical models, early to mid 18th century.

William Kelly, American inventor, mid 19th century.

Printer's composing stick, mid-18th century.