Ferumix was a Most High Academe in early Sanctaphrax. He was a famous mathematician, and he worked out a formula for calculating the weight of stormphrax given the surface area of the crystals versus the ambient light.

In his formula, x equals y + z over pi, x is weight, y is surface area, and z is ambient light or radiance.

Ferumix's Formula

Ferumix's formula.