Launch. - Mr. James A. Baker launched a new vessel from his ship yard about 6 o'clock last evening. She is a beautiful craft, staunch built, arched, with diagonal braces, and sits upon the water "like a thing of life." She is calculated to carry 15,000 bushels of wheat through the Welland Canal, and measures 126 feet keel, 25 1/2 feet beam, and 11 1/2 feet hold. She is owned by Thos. Y. Avery & Co., and is named Augusta after the sister of her owner. She is to be loaded and cleared immediately for the Upper Lakes.