The angles made between the common appendicle of the balance are obtuse - it is composed of the joining of a straight line with a curved line.

If the arm of the balance is alone, in its descent it will always maintain its first heaviness.

All the angles made by the joining of the real appendicle with the real arm of the balance are acute.
Of the real angles made by the joining of the arm of the balance with the appendicles of the weights, that one will be more acute which sustains the lesser weight.
Each of the arms of the balance is double, of which doubleness one is called real and the other potential.
Likewise, the appendicles of the weights attached to the arms of the balance are double, and one part is real and the other potential.
The potential junction of the arm of the balance with its appendicle is always right-angled.
The real and potential arms of the balance is the name given to that very short space that lies between the junction of the appendicle with the arm of the balance and the centre of that balance, and this arm is curvilinear.
And the real arms and appendicles of the balance are those that are material and palpable.
The potential arms and appendicles are invisible and impalpable, and their limits run from the centre of the balance to the right angle of their junction.

The mathematical centre is the centre of the accidental gravity of suspended bodies; and the natural centre of gravity of suspended bodies is that which divides the gravity of bodies into 2 parts equal in weight.
And this has no place in any mechanical operation, but only in the centre of the world.
The centre of magnitude is that which divides bodies into two parts of equal length.
In bodies of uniform quality the centre of the natural and accidental weight and of the magnitude are in one same place.
The appendicle of the weight is always real and potential.