The centre of gravity of any cylinder is the point of bisection of the axis.
There are things which seem incredible to most men who have not studied Mathematics.
Give me a place to stand, and a lever long enough, and I will move the world.
Eureka! (I have found it!).
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.
How many theorems in geometry which have seemed at first impracticable are in time successfully worked out!