. Behavior of the lower organisms. Animal behavior; Invertebrates. Fig. 29. — Repulsion of Spirilla of sea water by distilled water. The upper drop consists of sea water containing Spirilla; the lower of distilled water. At x these have just been united by a narrow neck. At y and z the bacteria are driven back before the advancing distilled water. After Massart (1891). 1 This conclusion is weakened by the fact that the bacteria are much less repelled by sev- eral substances — glycerine, asparagine, dextrose, and saccharose — even when they are so concentrated as to have higher osmotic pressure
. Behavior of the lower organisms. Animal behavior; Invertebrates. Fig. 29. — Repulsion of Spirilla of sea water by distilled water. The upper drop consists of sea water containing Spirilla; the lower of distilled water. At x these have just been united by a narrow neck. At y and z the bacteria are driven back before the advancing distilled water. After Massart (1891). 1 This conclusion is weakened by the fact that the bacteria are much less repelled by sev- eral substances — glycerine, asparagine, dextrose, and saccharose — even when they are so concentrated as to have higher osmotic pressure than the repellent solutions of the substances above mentioned ( Massart, 1889). This is explicable only by making certain special, un- proved assumptions for each case. The matter needs further 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 Jennings, H. S. (Herbert Spencer), 1868-1947. New York, The Columbia university press, The Macmillan company, agents; [etc. , etc. ]
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