A taxonomic survey of a wide range of bacteria has been made with the aid of an electrical computing machine. The strains examined fell into five main groups: (1) Gram-positive organisms, including streptococci, micrococci, staphylococci, and certain diphtheroids; (2) predominantly Gram-negative organisms, including enterobacteria, pseudomonads and also ; (3) ; (4) acid-fast bacilli; (5) spirilla. Within group 1 were subgroups representing and . Within group 2 were subgroups representing: () most enterobacteria together with and ; () and possibly also ; () pseudomonads; () ; () and () . The taxonomy suggested by this study is compared with that in current use. Temporary working type strains of most of the species are suggested for use in surveys of this kind. The limitations of the method and of using old laboratory records are discussed.


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