In _every_ case of putting off to a wreck in a gale, a lifeboat ships a great deal of water. In most cases she fills more than once. Frequently she is overwhelmed by tons of water by every sea. A boat full of water cannot advance, therefore baling becomes necessary; but baling, besides being very exhausting work, is so slow that it would be useless labour in most cases. Besides, when men have to bale they cannot give that undivided attention to the oars which is needful. To overcome this difficulty the self-emptying plan was devised. As, I doubt not, the reader is now sufficiently interested to ask the questions, How are self-righting and self-emptying accomplished? I will try to throw some light on these subjects. First, as to self-righting. You are aware, no doubt, that the buoyancy of our lifeboat is due chiefly to large air-cases at the ends, and all round the sides from stem to stern. The accompanying drawing and diagrams will aid us in the description. On the opposite page you have a portrait of, let us say, a thirty-three feet, ten-oared lifeboat, of the Royal National Lifeboat Institution, on its transporting carriage, ready for launching, and, on page 95, two diagrams representing respectively a section and a deck view of the same (Figures 1, 2, and 3). The breadth of this boat is eight feet; its stowage-room sufficient for thirty passengers, besides its crew of twelve men--forty-two in all. It is double-banked; that is, each of its five banks, benches, or thwarts, accommodates two rowers sitting side by side. The lines festooned round the side dip into the water, so that anyone swimming alongside may easily grasp them, and in the middle part of the boat--just where the large wheels come in the engraving--two of the lines are longer than the others, so that a man might use them as stirrups, and thus be enabled to clamber into the boat even without assistance. The rudder descends considerably below the keel--to give it more power--and has to be raised when the boat is being launched. The shaded parts of the diagrams show the position and form of the air-cases which prevent a lifeboat from sinking. The white oblong space in Figure 2 is the free space available for crew and passengers. In Figure 3 is seen the depth to which the air-chambers descend, and the height to which the bow and stern-chambers rise.