title: Goodman and Tisdale Reply.
authors.affiliation: Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: A J
authors.initials: AJ
authors.lastname: Goodman
authors.affiliation: Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: W A
authors.initials: WA
authors.lastname: Tisdale