(Civil War) Barbette Carriage for 10-Inch Rodman Gun #world #anewworldofunderstanging A fine folding map for

A fine folding map for the heart of the metropolis

"City of Bret Harte & Gertrude Atherton" (Boston)

west to the continental divide

with the "Unisphere" globe right at the center

Condition is good with some wear and soiling to the edges

(Civil War) Barbette Carriage for 10-Inch Rodman Gun #world #anewworldofunderstanging A fine folding map for(Civil War) Barbette Carriage for 10 Inch Rodman Gun., McClelland U. S. Govt., c. 1861 Detailed engineering engraving for wrought iron carriage that held the 10 inch gun. Thomas Jackson Rodman, a graduate of the military academy, developed a revolutionary method for manufacturing cannons. He theorized that cooling the interior of a cannon while keeping the outer surface hot would create a stronger and more durable weapon. This process, known as the