MATSU TEST SUCCESS. After a successful trial trip about the hv Thnrria.T afternoon the cower boat Matsu returned to the Atlas Qa Englnu Company's yards where final touches were put to her machinery and late yesterday afternoon the new craft slipped from her moorings alongside the Atlas yards and left for the Saoramento river to go into commission. The Matsu was built at the yards of William Cryer for M. Matsumoto, - the Japanese "Potato King" and will be used for service in the handling of , barges on the .Sacramento river. The new vessel Is 52 , Jeet in length, with a beam of 1 feet and a depth of 6 feet. It is propelled by an 80-horse power Atlas Gas Engine.