Plan of the Coast of Cherbourg : With a sketch of the works which the French are now executing to Inclose and Defend the Road, &c
Description
An attempt to build a breakwater around the harbor by sinking large wooden conical caissons to be floated from land, sunk, and filled with rocks. The history and engineering description is below the map. Vignette: Construction of wooden caisson. Prime meridian: GM. Relief: hachures. Graphic Scale: Miles, toises. Projection: Plane. Watermark: Crowned coat of arms; Letters. Printing Process: Copper engraving.