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

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

I am persuaded that this method [for calculating the volume of a sphere] will be of no little service to mathematics. For I foresee that once it is understood and established, it will be used to discover other theorems which have not yet occurred to me, by other mathematicians, now living or yet unborn.

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

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

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

Many people believe that the grains of sand are infinite in multitude ... Others think that although their number is not without limit, no number can ever be named which will be greater than the number of grains of sand. But I shall try to prove to you that among the numbers which I have named there are those which exceed the number of grains in a heap of sand the size not only of the earth, but even of the universe