. Animal life as affected by the natural conditions of existence. Animal ecology. FlG. -Tlie Infusoria observed by Eossbach. Chavon; c, Stylanychia pustulata. I, Chilodon CMcnllulus; h, Evplcles Highly magnified. ing of the temperature to 5° above freezing point (5° centigrade) has a quite different effect on the different species; thus, at this low temperature the vesicle of Chilodon cucullulus contracts seven times in a minute, that of Stylanychia pustulata only three times, while at 15° there are fifteen pulsations per minute in each. At 10° above zero * the length of one pulsation in

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. Animal life as affected by the natural conditions of existence. Animal ecology. FlG. -Tlie Infusoria observed by Eossbach. Chavon; c, Stylanychia pustulata. I, Chilodon CMcnllulus; h, Evplcles Highly magnified. ing of the temperature to 5° above freezing point (5° centigrade) has a quite different effect on the different species; thus, at this low temperature the vesicle of Chilodon cucullulus contracts seven times in a minute, that of Stylanychia pustulata only three times, while at 15° there are fifteen pulsations per minute in each. At 10° above zero * the length of one pulsation in * Zero, in the centigrade thermometer, is freezing point; 100° the boiling point of water at tiie 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 Semper, C. (Carl), 1832-1893. New York, D. Appleton

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Keywords: ., bookcentury1800, bookdecade1880, bookpublishernewyo, bookyear1881