12otto Strutt (1871) "On the scattering of light by small particles, " PhilosophicalMagazine, series4, vol. 41, pages447-454.
2John Strutt (1899) "On the transmission of light through an at- mosphere containing small particles in suspension, and on the origin of the blue of the sky, " Philosophical Magazine, series 5, vol. 47, pages 375-394.