Statistics for occurrence #1 of “Engineer-in-chief B. F. Isherwood” in chapter 51 of Admiral David D. Porter, The Naval History of the Civil War.:

... time were built a set of vessels called the Miantonomoh class — a wooden vessel designed by the naval constructors, and built at the Navy Yards with Ericsson turrets, the machinery designed by Engineer-in-chief B. F. Isherwood , chief of the Bureau of Steam Engineering; with a high rate of speed, perfect ventilation, impregnable, and with the enormous battery of four 15-inch guns, all combined in a vessel of the moderate ra...

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