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 perimeter of the earth is about 3,000,000 stadia and not greater.

The diameter of the earth is greater than the diameter of the moon and the diameter of the sun is greater than the diameter of the earth.

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

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

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

Man has always learned from the past. After all, you can't learn history in reverse!