At head of title: Survey of the northern and north western lakes Made in obedience to acts of Congress and orders from the Headquarters of the Corps of Engineers, War Department.
Includes: Authorities -- Note -- Dangers -- Magnetic variation -- Water table -- Light-houses -- Abbreviations -- Sailing directions.
"Aids to navigation corrected to January 1, 1880."
Projected from trigonometrical Surveys executed under the orders of Major C.B. Comstock, Corps of Engineers, Brvt. Brigadier General, U.S.A. in 1871, 1872, and 1873. Published in 1876.