2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/26169Within the ``anisotropic relaxation time'' approach to transport processes, I obtain a new geometric formula for the weak-field Hall conductivity of metals, which generalizes previously-known formulas due to Tsuji (restricted to cubic 3D metals) and Ong (for 2D metals).4 pages, 1 figure; minor modification to emphasize that the 2nd form of the expression as an integral in l-space is inspired by Ong's 2D workMaterials Sciencetext