In the dusk, our little Quintus takes an apple; divides it into all the figures of Stereometry, and spreads the fragments in two heaps on the table; then as the lighted candle enters, he starts up in amazement at the unexpected present, and says to his brother, "Look what the good Christ-child has given thee and me; and I saw one of his wings glittering."
"The Campaner Thal and Other Writings"
Jean Paul Friedrich Richter
His discovery also extended to the volume of the cone, and it was his work that gave the beginning to the science of Stereometry, the mensuration part of solid geometry.
"The Teaching of Geometry"
David Eugene Smith