If two equal weights have not the same centre of gravity, the centre of gravity of both taken together is at the middle point of the line joining their centres of gravity.
Book 1, Proposition 4. - On the Equilibrium of Planes
If two equal weights have not the same centre of gravity, the centre of gravity of both taken together is at the middle point of the line joining their centres of gravity.
Book 1, Proposition 4. - On the Equilibrium of Planes