Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

558 MOLESWORTH'S POCKET-BOOK Wave Links of Vessels. *næ bow lines or entrance sliould be u curs e of x ersed sines. The stern lines cycloidal. To construct the curve of the entrance lines, divide the hiDgth into any number of equal parts and at each division erect perpendicular lines. At one end draw a semicircle with diameter = half the breadth of the vessel, divide the circum- ference into the same number of equal parts as the length, and from each division draw horizontal lines; their mteisection with the vertical lines give points in the curve. Org345678 Ji The cycloidal lines of the stern may be found in the same ■manner, but the horizontal lines must be prolonged beyond the points of intersection to a distance in each case equal to the horizontal distance of the circumference of the semicircle at that line from its perpendicular diameter, itus tue hori- zontal line at the intersection of the lines 1 and 1 must be prolonged to a distance a — a. 2 and 2 „ „ » b' = b‘