title: On the Lorentz-Lorenz formula and the Lorentz model of dielectric dispersion: addendum.
abstract: The approximate equivalence relation equating the frequency dispersion of the Lorentz model alone with that modified by the Lorentz-Lorenz formula is shown to also equate the branch points appearing in each of these two descriptions.
authors.forename: Kurt
authors.initials: K
authors.lastname: Oughstun
authors.forename: Natalie
authors.initials: N
authors.lastname: Cartwright