322 Mr. Harvey’s experimental inquiries relative to the 
distance of the centre of force from the same co-ordinate 
plane. These numerical elements being respectively applied 
to the above formula, will determine the distance of the centre 
from each co-ordinate plane ; and from thence, its absolute 
situation in each position of the vessel. 
The following table contains the results of the computa- 
tations, for each co-ordinate plane, in the three positions of 
the vessel. In the first column is entered the direction of 
the ship’s head ; in the second the distance of the centre of 
force from the horizontal co-ordinate plane, corresponding to 
the three positions of the ship ; and in the third and fourth, 
the distances of the same point, from the longitudinal and 
transverse planes. These numerical results evidently de- 
termine the position of the centre of force, for each system 
of intensities. 
Direction of the 
Ship’s Head. 
Distance of the Cen- 
tre of Force, from 
the Horizontal Co- 
ordinate Plane. 
Distance of the Cen- 
tre of Force, from 
the Longitudinal 
Co-ordinate Plane. 
Distance of the Cen- 
tre of Force, from 
the Transverse Co- 
ordinate Plane. 
North. 
7-58 
15-98 
49.23 
East. 
7-77 
16.13 
50.84 
North-west. 
7.64 
15.89 
49-84 
From the preceding Table it appears, that the position of 
the centre of force, is not constant. This indeed, might have 
figs, i, 2 , 3 , Plate XVI ; and N', O', &c., O", P'', &c. P'", O'", &c., in the longitudinal 
plane, figs. 1 , 2 , 3 , Plate XV., were employed in the computations relative to the 
situation of the centre of force, to denote the perpendiculars here alluded to. They 
are retained in the diagrams, for the purpose of any farther reference. 
