Sketch of the plans, present condition and proposed results of the United States dry docks at the navy yards of Philadelphia, Kittery and Pensacola upon the new system of floating docks, basin & railways, now constructing under contracts with Messrs. Dakin & Moody and Gilbert Secor, made by the Navy Department under a law of Congress, passed August 3rd, 1848. (Printed by P. Miller & Son,, 1849)