Traction apparatus, probably from 16th century Italy.

Niccolo Tartaglia, Italian mathematician and mechanician, c 1550-1560.

John Napier, Scottish mathematician, c 1600s.

Square table alarm clock, German, c 1550.

Executioner's mask, 1501-1800.

Executioner's mask, 1501-1800.

Cugnot's steam traction engine, 1770.

Traction engine on level crossing at Peterborough, c1911.

Aveling and Porter steam traction engine, c 1890.

Boydell's traction engine, 1857.

Cugnot's steam traction engine of 1770.

'Astronomical Observatory of the Collegio Romano', Rome, 1855-1878.