Ten Mathematical Equations 4
Abstract
Two stamps from The Ten Mathematical Equations that Changed the Face of the Earth series. Issued by Nicaragua on May 15, 1971.
Description
"Pythagorias' Law" 30c. air stamp depicting the Pythagorean theorem on the Parthenon.
"Boltzmann's Law" 40c. air stamp depicting "the application of petroleum gases within cylinders and the resultant explosive forces driving simple cranks."
Keywords
Stamp collecting, Postage-stamp albums, Nicaragua, Geometry in architecture, Pythagorean theorem, Pythagoras, Boltzmann, Ludwig, 1844-1906, Combustion