Title: Specifications for triple-expansion twin-screw propelling engines, with boilers and auxiliary machinery, for gunboats nos. 8 and 9, of about 1,200 tons cruising displacement each
Subjects: Bancroft 1892 (gunboat; U.S. Navy), Wilmington 1895 (gunboat; U.S. Navy), Helena 1896 (gunboat; U.S. Navy)