title: Some remarks on the first law of photochemistry.
abstract: The first law of photochemistry stating that light has to be adsorbed in order to cause a photochemical reaction is usually attributed to T. Grotthuss and J. W. Draper, but quite similar observations were earlier reported by J. Beccari. Some key issues in the formulation of this law are briefly discussed.
authors.affiliation: Department of Chemistry, University of Pavia, 27100 Pavia, Italy. angelo.albini@unipv.it.
authors.forename: Angelo
authors.initials: A
authors.lastname: Albini