Researches into Induced Cell-reproduction in Amoebae

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    Abstract

    THE investigations described in this volume were undertaken with the view of supporting the theory of H. C. Ross, that cell-reproduction is brought about by certain chemical agents termed “auxetics,” and that their effect is increased by the addition of other substances known as “kinetics.” The authors claim to have confirmed this theory, and to have shown that the mode of action of these substances is probably through the medium of enzymes. The presence of these agents in the environment is stated to produce variations in the morphology of the organism. Methods of cultivation of amcebse and their examination by the “jelly method,” are described. The encystment of an amoeba is stated to be due to the action of certain deleterious bacterial products, and it is claimed that the subsequent excystation is caused by other products which act on the cyst-wall from without, and are of the nature of ferments. A detailed account is given of the preparation of cultures of the amœba with pure strains of different bacteria. The amoeba used in these researches was a species found by the authors living in a solution of sodium chloride (i per cent.) and sodium citrate (3 per cent.) in the laboratory, and named by them Amoeba ostrea. A parasitic micrococcus, which was very deadly to the amœba, was also isolated and investigated.

    Researches into Induced Cell-reproduction in Amoebae.

    By J. W. Cropper A. H. Drew. Pp. 112 + plates. (The John Howard McFadden Researches, Vol. IV.) (London: John Murray, 1914.) Price 5s. net.

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    Researches into Induced Cell-reproduction in Amoebae . Nature 93, 611 (1914) doi:10.1038/093611a0

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