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 Dept.
Includes: Note -- Authorities -- Water Table at Ogdensburgh, N.Y. -- Magnetic Declination.
Projected from trigonometrical Surveys executed under the orders of Major C.B. Comstock, Corps of Engineers, Bvt. Brigadier Gen. U.S.A, in 1871, 1872, and 1873.