Vessels Launched And Repairing. Yesterday the Spedden Shipbuilding Company launched a large lighter for stock, this being the fourth of a series built within a few months. It is 91 feet long, 28 feet beam and 7% feet deep, and will be followed by another of the same dimensions. Charles Rohde Son sent overboard a covered lighter for the James Benday, Jr., Salt Company, for service in the harbor. Its dimensions are W feet long, 2% feet beam and 7% feet deep. At once the same builders will raise the frame for a harbor dredging machine for the Potomac Company, to be % feet long, W feet beam and 9 feet deep. The United Fruit Company's steamer Barnstable, which went ashore in St. Ann’s bay, Jamaica, was floated from the dock of the William Skinner Ship building and Drydock Company, after being cleaned and painted. A survey by Capt. E. H. Sanford showed that the ship had not been damaged by be ing aground. Lightship No. 72, of Diamond Shoals Station, followed the Barnstable in dock, to be cleaned and painted, and the schooner E. Arcularius, of Rockland, Maine, was hauled,up for survey, having struck a shoal in the Chesa while bound here from Somes found with stone. She was found to be leaking slightly and had a piece of shoe carried away. She will be repaired here, and will load coal for Waldboro, Maine. The iron barge Viola W. Tunis, which was aground in the bay while bound here from Norfolk with lumber, was hauled up at the same yard, and is having 60 feet of steel shoe replaced by McIntyre Henderson. Today the United Fruit Companys’ steamer Bea con will be docked by the Baltimore Shipbuilding and Drydock Company for cleaning and painting. The tug Walter is on the railway at the yard of the Marine Railway, Engine and Boiler Works for repairs. Henry Brusstar has the Ada on the railway for cleaning and painting and repairs to stern above deck. Woodall Co. have in drydock the hull of the mammoth dredging machine General Mackenzie, built in Louisiana for the Hurst-Clark Dredging Company, of this city. The framework is being erected preparatory to receiving the machinery, which is being built by the Maryland Steel Com pany, Sparrows Point.