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LAKE MICHIGAN, 191 and when past Gravelly Shoal buoy W. by N. 8.N. to clear Corona shoal. The fog- signal is a 10-inch steam whistle, giving a blast of 5 seconds' duration, followed b an interval of 45 seconds, then a blast of 8 seconds, followed by an interval of 10 sec- onds. Point Peninsula light-house, N. W. by W. i W., 174 miles. Pottawatomie light-house, S.W. + W., 104 miles. Gravelly Island Shoal.--Black, 2d-class can buoy in 18 feet of' water. Marks a small shoal with 17 feet of water over it 14 miles north of Gravelly island. There is a small 14-foot patch 3 of a mile north of the island; therefore only light- draught vessels should pass to the southward of the buoy. Poverty Island Shoal buoy, N. KE. 7 E., 14 miles. Poverty Island light-house, E. by S. 2S., 34 miles. Poverty Island Shoal.--Red, 2d-class nun buoy in 18 feet of water. Marks the southwestern point of a small shoal. to the westward of Summer island. Least water is 15 feet. Gravelly Island Shoal buoy, 8.W. 4 W., 14 miles. Poverty Island light-house, 8. E. 4 E., 22 miles. SEUL CHOIX POINTE LIGHT-STATION.--A fixed white light, 3d order, visible 17 miles Conical red brick tower connected by covered way with 14- story red brick dwelling with red roof. Light 88 feet above lake level. A coast light, on the easterly extremity of Seul Choix Pointe. During thick and foggy weather a 10-inch steam whistle sounds blasts of 4 seconds, separated by silent 1n- tervals of 26 seconds. Poverty Island light, S.W. % W., 46 miles, St. Helena light, E,7458., 51 miles. North point of Squaw island, E. by 8. 88., 164 miles. In the bay to the north and eastward there is good anchorage and protection from all winds except from south and east. Come-to with light about 8. S.W. 14 miles distant. Keep a lookout for trap nets. : | Whiskey Island Shoal.--A red spar buoy in 17 feet of water, on the ex- treme south point of the shoal, lying to the southward and westward of Whiskey rises a W. point of Beaver island 8. E. by E. N. W. point of Trout island W. S.W. + W. : SQUAW ISLAND LIGHT-STATION.--A fixed red light varied by a red flash every 15 seconds, 4th order, visible 154+ miles. Red brick tower 48 feet high, square at base and octagonal above, and forming the northwest corner of red brick dwelling with red. roof. On the northerly end of Squaw island, the most northerly of the Beaver Island group. The light illuminates the entire horizon. The. - focal plane is 60 feet above the lake level. During thick or foggy weather a 10-inch steam whistle sounds blasts of 5 seconds' duration, séparated by alternate silent in- tervals of 20 and 40 seconds. The fog-signal house stands about 200 feet N. by E. from the light tower; it isa red brick structure with corrugated iron roof painted brown A coast light marks the turning point into Lake Michigan.' Garden island N. Tangent E. byS 48. 3§ miles. Seul Choix Pointe light-house W. by N. £N., 164 miles; Scott's point N.W. by N. 4.N., 94 miles. : Squaw Island Shoal.--Black 2d-class nun buoy in 22 feet of water, on the north end of Squaw Island shoal. The western end of Whiskey island slightly open to the west of Squaw island. Northwest end of Squaw island S. S. W. $ W., 24 miles. Hast tangent of Garden Island, S. E. 4 E. . Garden Island Shoal.--A red and black horizontal stripes spar buoy in 15 feet of water, known on the chart as the 18-foot spot, N. E. by N.4N., 2% miles from the northwest end of Garden island. : Lansing Shoal.--A red 2d-class nun buoy in 28 feet of water. Marks the _ Southeast end of a shoal N. 2 E. from Squaw Island light. There is a spot with 194 feet 700 yards N. W. % W.., and another with 23 feet 1.500 yards W. &N. from this buoy. Seul Choix Pointe light-house W.4 N. 164 miles. Squaw Island light-house -- S.# W.4% miles, Squaw Island buoy 8. 84 miles. Simmons Reef light-vessel E. 174 miles. This buoy is intended to cover an extensive shoal. Light-Houses, Buoys and Harbors Standing to the North- ward wm Green Bay. Drisco's Shoal.--Red and black horizontal stripes, 2d-class can buoy in 21 feet of water. Off the northeast end of Drisco's shoal, in the north end of Green bay. The shoal is a dangerous one, lying nearly in the track of vessels bound from Porte des Morts to Escanaba, and is about one-quarter of a mile in extent ina northeast and southwest direction. The charts indicate 6 and 7 fathoms of water in its position,