390 The Laws of Statical Equilibrium: 
dicular to Ba Be, Bd and Bs; then by last 
Art. Kx PV + K’xPx=Lx Pw; but Kx PV 
=FxPS—GxPT; for the same reason K’x 
Pv=F’x Ps+G’ x Pi, therefore LX Pw=F x PS 
—Gx PT+F’x Ps+G’xPi, &c.; that is, if 
any number of forces F, G, F’, G’ actin the 
directions BA, BC, Ba, Be, &c. lying in the 
same plane, and Bh be the direction of their 
common equivalent L, the momentum of L 
referred to any point P=the sum of momenta 
of forces EF’ and G’ without the angle of whose 
direction P is situated+the difference of mo- 
menta of F and G within the angle of eae 
directions the same point lies. 
