84 Col. Beanfoy on the [Feb. 



5 0-18 x 324-52 = 58 



117 

 178 

 243 

 315 

 396 



Figs. 8, 9, 10, are the greatest vertical sections of three men 

 of war. 



The object in making these experiments was to determine 

 how much the meta centres of these parts of the ships are 

 elevated above the load water line. Each figure was submitted 

 to two experiments, for determining the height of the meta 

 centre above the centre of gravity of the displaced fluid. These 

 two were then added together, and the draught of water sub- 

 tracted. For instance, the 18 gun brig 3-22 inches, the mean 

 height of the meta centre (see Table VIII and Exper. 1) above 

 the point E, being added to 2*24 inches. The centre of gravity 

 gives 5*46 inches, from which deduct 3*60 the draught of water, 

 and the remainder 1*86 will be the quantity sought. The beam 

 of a man of war of this size is 30 feet, and -fe%%- °f 30 is 5*58 

 feet, which is the height of the brig's meta centre above the 

 water when inclined between 15° and 20°. (See Table VIII.) 



The mean height of the Leopard's meta centre above the 

 centre of gravity of the water is 2-38, to which add 2-38, and 

 from the total subtract 4-13, the remainder y %\ is the distance 

 of the meta centre above the line of floatation, or T gg-^ parts of 

 the breadth. The beam or greater breadth of this 50 gun ship 

 is 39^ feet, T ^ s - of 39^-, is 2-49 feet, the meta centre's height, 

 which point may be considered as stationary. 



The mean height of the meta centre of the Howe above the 

 centre of gravity of the displaced water is 2-26 inches, to which 

 add 2-43, and deduct 4'27 (the draught of water). The remainder 

 -^y- parts of an inch is the meta centre's altitude above the 

 water, or -^-5- of the width. The greatest breadth of the 120 gun 

 ship is 54 feet 5 inches, or 54-417 ; T f^ of 54-417 is 2-27 feet, 

 the Howe's meta centre above the load water line. The meta 

 centre being stationary, proves that the midship bends of the 

 Howard and Leopard are in great measure circular. 



The centre of gravity of the displaced water of the men of 

 war was determined mechanically, and the columns in the tables 

 headed Theor. are not filled up, it being impossible to give any 

 o-eneral rule for finding the centre of gravity of bodies formed 

 by different curves or mixed lines. 



Although the theory of stability is perfect, yet the calculations 

 are attended with considerable trouble, especially in complex 

 forms, such as the hulls of ships, which require the labour of 

 months. Under these circumstances is not the mechanical 



