title: Interstellar extinction by graphite, iron and silicate grains.
abstract: Recent data on the interstellar extinction curve and on the diffuse galactic light may be accounted for by a mixture of graphite, iron and silicate grains.
authors.affiliation: Institute of Theoretical Astronomy, Cambridge.
authors.forename: N C
authors.initials: NC
authors.lastname: Wickramasinghe
authors.forename: K
authors.initials: K
authors.lastname: Nandy