Question: What is the name of the biographer and one-time student of this British physicist and mathematician who discovered the Taylor–Proudman theorem along with Joseph Proudman?
Sentence (from "Poynting's theorem"): In electrodynamics, Poynting's theorem is a statement of conservation of energy for the electromagnetic field, in the form of a partial differential equation, due to the British physicist John Henry Poynting.
Relevant evidence: No