The centre of gravity of any parallelogram lies on the straight line joining the middle points of opposite sides.

Eureka! [I have found it!] On discovery of a method to test the purity of gold.

Two magnitudes whether commensurable or incommensurable, balance at distances reciprocally proportional to the magnitudes.

Equal weights at equal distances are in equilibrium and equal weights at unequal distances are not in equilibrium but incline towards the weight which is at the greater distance.

The centre of gravity of any cylinder is the point of bisection of the axis.

Mathematics reveals its secrets only to those who approach it with pure love, for its own beauty.

Give me a place to stand, and a lever long enough, and I will move the world.