Conduction# Fourier’s law, thermal resistances, fins and finite-difference conduction. Fourier’s Théorie analytique de la chaleur (1822) Fourier's Théorie analytique de la chaleur (1822) Harper and Brown’s fin efficiency (1922) Harper and Brown's fin efficiency (1922) Crank and Nicolson: numerical conduction (1947) Crank and Nicolson: numerical conduction (1947)