Lake Ontario. Coast chart no. 1, Stony Point and South Bay Point to Howe Island : projected from a trigonometrical survey executed under the orders of Major C.B. Comstock, Corps of Engineers, Bvt. Brig. Gen. U.S.A. in 1873, '74 and '75.United States. Army. Corps of Engineers[1875]Depths shown by gradient tints and soundings.Includes "Sailing instructions", "Dangers", "Magnetic variations" table, "Light-houses", "Authorities" and "Water table."cartographic