. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 98 LORANDE LOSS WOODRUFF. The copper sulphate experiments on the Stylonychia culture were carried on for only ten days, but increased susceptibly to copper sulphate is shown by the alcoholized lines (cf. Fig. 7). The division rate of the three Paramecium cultures and the three Stylonychia cultures subjected to copper sulphate shows distincly that the organisms which have been treated with alcohol are less resistant to copper sulphate. \T. General Considerations. The aim of this paper has been to set forth merely the facts wh
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 98 LORANDE LOSS WOODRUFF. The copper sulphate experiments on the Stylonychia culture were carried on for only ten days, but increased susceptibly to copper sulphate is shown by the alcoholized lines (cf. Fig. 7). The division rate of the three Paramecium cultures and the three Stylonychia cultures subjected to copper sulphate shows distincly that the organisms which have been treated with alcohol are less resistant to copper sulphate. \T. General Considerations. The aim of this paper has been to set forth merely the facts which the experiments have revealed. Several possible causes 47 4» 49 50 51 52. Fig. 5. Paramecium. Culture 1^ (hay infusion + alcohol) = â line; culture I' (hay infusion + alcohol + CuSOJ = line. X = po'^t at which the culture subjected to copper sulphate died out. of the phenomena observed may be suggested, but it will be of more value to reserve a general discussion of these until more data from experiments are at hand. Calkins and Lieb, as already mentioned, found that alcohol in medium doses, c. g., one part of alcohol in 2,500 parts of culture medium, acted as a continued stimulus to the division rate of Paramecium. The results of my experiments obtained up to the present time fail to show such a marked uniformity of effect from alcohol treatment, as a depression of the rate of division, followed by fluctuations above and below the control, was the result in Paramecium P and in all the succeeding cultures of both species, after an initial stimulation of the division rate of a longer. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, C
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