At head of title: Survey of the northern and northwestern lakes. Made in obedience to acts of Congress, and orders from the Headquarters of the Corps of Engineers, War Department.
Includes: Water Table -- Light-houses -- Note -- Sailing directions -- Authorities -- Magnetic variations.
Projected from a trigonometrical Survey executed under the orders of Major C.B. Comstock, Corps of Engineers, Bvt. Brigadier Gen. U.S.A. in 1875. Published in 1878