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8 CHANGES AND ADDITIONS. The front light is on a pole on the elevated tramway west of the Eddy west wharf. It is elevated 35 feet above the level of the lake. The back light stands 295 feet N. 54 E. from the front light, and is placed on the west end of the ridge of the roof of the firm's office building. It is elevated 50 feet above the level of the lake. Whenever the electric power plant is inoperative fixed white oil lights will be temporarily substituted for the electric lights. 2. A range of lights has been established to mark the axis of the dredged cut leading to the head of the Government wharf. . The front light is a fixed red light, shown from an anchor lens lantern on a shelf on the southeast corner of the drab, rectangular wooden store- house on the Government wharf. The light is elevated 25 feet above the level of the lake, and should be visible 6 miles from all points of approach by water. | The back light stands on the shore 1,550 feet NE. by N. from the front light, and on the west side of the mouth of Blind river. The light is a fixed red light, shown from an anchor lens lantern hoisted on a pole. It is elevated 40 feet above the level of the lake, and should be visible 7 miles from all points of approach by water. 4. The sides of the channel leading to the Eddy wharves are marked by spar buoys maintained by Eddy Bros. & Company. No particulars respecting these have been obtained. . 5. The sides of the channel leading to the Government wharf are marked by 4 spar buoys; two red ones on the starboard and 2 black ones on the port hand entering. : Great Duck Island.--On the opening of navigation the fog alarm at. Great Duck island light station will be strengthened by the substitution of a diaphone, operated by compressed air, for the steam horn now in use. The diaphone will, during thick or foggy weather, give one blast of 3 seconds' duration every 30 seconds. | _ The horn, elevated 20 feet above the level of the lake, projects from the southwest face of the fog alarm building. COVE ISLAND LIGHT STATION.--The steam fog horn heretofore maintained on the north point of Cove Island, entrance to Georgian Bay, has been replaced by a diaphone, operated by compressed air, which, during thick or foggy weather, will give one blast of five seconds' duration every two minutes. A wooden addition 22 feet by 28 feet has been built to the fog alarm building. 2 GEORGIAN BAY. CAPE CROKER LIGHT STATION.--A new fog alarm building has been erected at Cape Croker light station. The building stands to the southward of the lighthouse and is 40 feet back from the water's edge. It is a rectangular wooden building, painted white, with red roof. The new fog alarm consists of a diaphone, operated by compressed air, which, during thick or foggy weather, will give one blast of five seconds' duration every minute. The horn, elevated 30 feet above the level of the lake, projects from the northeast side of the building. The fog siren, here- tofore used, has been discontinued.