Draining water from behind a coffer-dam, 1588.

Machine for raising water from a well, 1588.

Device for lifting a door from its hinges, 1588.

Ballista, or crosbow for projecting heavy misiles, 1588.

Machine for removing excavated earth, 1588.

Emperor Napoleon III and the Prince Imperial cycling at the Tuilleries, 1869.

Method for firing artillery at night, 1588.

Machine for lifting very great weights with ease, 1588.

Device for forcing apart the iron bars of a grating, 1588.

Device for cutting the iron bars of a portcullis, 1588.

Floating bridge made from hexagonal sections, 1588.

Retractable bridge for crosing a moat, 1588.