“…Reports and papers from NASA-supported studies in a c y lindrical duct that were published since the previous article was presented are summarized b y Holdeman et al (1996). Recent results from rectan gular and annular confi gurations include, Bain et al (1992Bain et al ( -1995b, Bain et al (1996), Blome yer et al (1996), Chiu, Roth, Mar gason & Tso (1993), Chiu, Roth, Karlin, Margason & Tso (1993), Crocker & Smith (1992, , Doerr & Henneke (1993), Doerr et al (1995a & I 995b), Everson et al (1995), Liscinsk y et al (1992), Liscinsky, Vranos, & Lohmann (1993), Liscinsk y, True, & Holdeman (1993). Liscinsky et al (1994Liscinsky et al ( -1996b.…”