A Stkam Caxai. Boat, tli«* Thomas Wheeler, of Georgetown, (’apt. E l. Lynch, airivttl here Mood ay morning at ten o’chx k, having made the trip up from Georgetown in the unprccedentc 1 time ot fifty hours. The Wheeler is a propeller, with an attachment invented by Captain Lynch, and is owned by that gentleman■i and Commodore George Ft. Baulch of the United States Navy. (’apt. Lynch U an old and experienced machinist and has oh-nection with the steam marine and nter-short halts along the line. (.’apt. Lynch isring the trip lie can still further improveper hour without washing the hank in the least. So much is lie impressed with the fitness of his boat tlor his work, that ho i* about to have ten built by the Messrs. Young of this city, adapted to his machinery, which will be run along the line of the canal. The Wheeler will go down to-day, loaded with Maryland coal.tnined patents on several inventions in con-confident that from observations made du-