Abstract
Certain disturbances were noted when the electrical conductivity of sodium casein-ate solutions was measured. As it was suspected that they were due to bacterial contamination, cultures were made and an organism was isolated which, when added to sterile solutions, produced the same kind of disturbances. Apparently it had been introduced with the water. Classification showed the organism to closely resemble others previously described, but with differences inducing the author to consider it a new species, Achromobacter caseinicum. It was not encountered in some other water samples from different sections of California. The organism is non-pathogenic.

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