Oxidation-reduction potentials of pneumococcus cultures

IN previous communications the electrode potential behaviour of haemolytic streptococci [Hewitt, 1930, 1], C. diphtheriae [1930, 2], staphylococci [1930, 3] and pneumococci [1930, 4] has been described by the author and it has been shown that the oxidation-reduction potentials established in bacterial cultures depend upon the cultural conditions and upon the organism studied. The potentials developed in streptococcal cultures are roughly similar to those in pneumococcal cultures, but are quite different from those in staphylococcal and C. diphtheriae cultures.