Bridge composed of broad-bottomed boats, paddled via an internal crank, positioned with a rudder, and fastened together.
Monogrammed "JG" on rock at lower right.
Mechanics: horizontal crankshaft.
Ramelli, Agostino. “Plate 152: Bridge for Crossing a City or Fortress Water Moat.” In Le Diverse Et Artificiose Machine Del Capitano Agostino Ramelli. Paris, France, 1588. https://digital.sciencehistory.org/works/c821gk006.
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