One of the largest buildings in the dockyard is the foundry, which is considered the most complete in the world.  We looked into the sheds, as they are called, where the boilers for the ships are constructed, and could scarcely hear ourselves speak, from the noise of hammers driving in the rivets.  Many of the boilers were large enough to form good-sized rooms.  We walked along the edge of the steam basin.  It is nine hundred feet long and four hundred broad.  The ships, I should have said, are built on what are called the building slips, which are covered over with huge roofs of corrugated iron, so that the ships and workmen are protected while the building is going forward.