JULLANAR.-TABLE OF HALF BREADTHS AND DEPTHS. at No. 4 W.L.. 3.3 3.8 4.1 " at No. 5 W.L........ 0'4 10 1.9 2.6 ---0-6 11 16 20 22 23 2-3 2-2 18 14 10 04 4.3 4.1 3.8 3.3 2.6 1.8 0.8 Height above L.W.L. 7.6 7.1 6.6 6.0 5.6 5.1 4.9 4.5 4.2 4.1 4.0 3.9 3.8 3.9 4.0 4.1 4.3 46 5.0 5.4 5.9 Depth below L.W.L. to underside of keel...... 00 28 44 66 73 86 9-8 10-8 117 12.5 13.0 13.2 133 134 135 137 13.5 4.8 3.6 2.0 The sections are 5ft. apart, No. 1 commencing from the fore-side of the stem. Every other section is omitted in the drawing. The water-lines are 2ft. apart. All the measurements are given in feet, and decimal parts or of a foot, with plank on. CHAPTER XXIX. DOUBLE BOATS. DOUBLE boats, in some form or the other, are met with all over the world, and the principle is adopted with the main object of acquiring great stability. But, although double boats may have in this way great stability, it must not be supposed that they are uncapsizable. They could be capsized by carrying a heavy press of canvas, or they might be thrown over by a sea, just as a lifeboat is sometimes. In 1873, the late Mr. H. Melling, of Liverpool, had what he termed a safety yacht constructed on the double hull principle, as shown on the opposite page (Plate XXXVI.). Mr. Melling thus described his boat : Happen what may, she cannot sink, for even if scuttled she will remain as a strongly-put-together life-raft. She can accommodate herself to draw only one foot of water, although of the size of 15 tons. She can be beached at pleasure without risk of straining. She can be anchored and put into places out of the way of harm or being run down or afoul of, and ride to her anchor in a roadstead, light and buoyant, with little strain on her cable. All is of pine wood, light and buoyant, having no ballast whatever. She has comfortable cabin accommodation on deck, affording a good look-out' fore and aft. Galley and stowage berths are in the forecastle, and by a system of casks stowed away in the pontoons and on deck she could carry stores, provisions, water, &c., for a voyage, which as they are emptied and bunged up will add materially to her safety. She made very good weather of it in turning down the Dee and along the Welsh coast over shallows against a strong wind. In running back off the wind she attained extraordinary speed. "The use of the boards are as follows: if the fore board is down, or part down, it makes her stay in a sea way; if the aft one be down it holds her steady in scudding, and prevents broaching to; if they be all down, she holds a good wind and makes no lee way. They can be let down partially |