WRECKING TUG. - The new steam wrecking tug Mary Grandy, the arrival of which has already been noticed in our columns, came down yesterday from Lake Huron, making a short call to the foot of Bates street. When we take into consideration the purposes for which this fine steamer is specifically designed, we are free to accord that those requisites have been combined in a manner unsurpassed by any other that has come under our notice. She is intended for towing as well as for wrecking, and for the latter she has a complete fit out. The solid strength of her build is in every particular point complete, and in this respect no pains has been spared. What has all along been much needed in this locality is a reliable, heavy weather wrecking tug in command of which a head which insurance agents and vessel owners can rest assured that in whatever whatever is undertaken will be successfully be carried out. We need only add that this important attribute, both steamer and commander have the requisite qualifications. The Grandy is the largest of the class presently afloat on these waters, being the following dimensions: Length 140 feet 8 inches, breadth 23 1/2 feet, depth 13 feet 3 inches and measures 325 tons burthen. She was built by Ira Laffrinier, Esq., one of Cleveland's oldest shipwrights, who stands at the head of his profession. Her engine, which is a splendid specimen of mechanism, was got up at the Globe Steam Engine Works in Cleveland, Messrs. Lord & McClelland being the designers. Cylinder 34 inch bore by 30 inch stroke; boiler 22 feet long, 8 1/2 foot shell, return fine, and manufactured by Scott Levake, who is widely celebrated in that line. Her wheel, which is of the Philadelphia pattern, is 9 1/2 feet, with 16 1/2 feet lead. She is commanded by J. L. D. Kimball; 1st officer, J. R. Innis; 2nd officer Thos. Ruciman; George Clifford, 1st engineer; L. D. Bullard, 2nd do.; Miss Harriet Carpenter, stewardess. Her cabins throughout have been got up with excellent taste, and in short the Mary Grandy such as to outvie any or all competition. She belongs to Winslow's well-known line of steamers.