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Published online by Cambridge University Press: 15 May 2009
The α-naphthol modification of the Voges-Proskauer (v.-p.) test described by Barritt (1936) has proved satisfactory for the examination of the coli-aerogenes group in the hands of several workers, including Harold (1936), Vaughn, Mitchell & Levine (1938), Kluyver & Molt (1939), Iyer & Raghavachari (1938–9), and Batty-Smith (1941).