Iron Ships John Roach & Son's exhibit-Machinery Hall 1 silver albumen print; 26 x 21 cm. Mounted on backing board. Title on label: Iron ships. Exhibit titles: Roach, John, & Son, New York, Exhibit #1006s; American Dredging Co., 10 South Delaware Avenue, Philadelphia, Pa, Exhibit #1024; New York Safety Steam Power Co., New York, N.Y., Exhibit #1020; Standard Machinery Co., Mystic River, Conn., Exhibit #473, Machinery Hall, Bldg. #2. "This armor plate made at the works of John Roach & Son New York and Chester, Pa. As a specimen of the plating to be used on iron clad "Puritan", now constructing at Chester, Pa., Wt.19,700 lbs. 10 feet long 3 feet 8 in wide 12 3/4 in thick."--Display sign. Ship models, armor plating, and marine engine works. At top are framed paintings of ships.