. General physiology; an outline of the science of life. 374 GENERAL PHYSIOLOGY through the seeds of the other. After some days under this arrangement the seeds that were in pure air had grown out into long seedlings (e), while those bathed by the ether-vapour showed no growth at all, without, however, having lost the capacity of germinating in pure air. The brothers Hertwig ('87) have investigated the depressing action of solutions of chloral hydrate upon cell-division in eggs of the sea-urchin. When they let a 0-2—O'S per cent, solution of chloral act for some time (5 minutes—3 hours) upon e
. General physiology; an outline of the science of life. 374 GENERAL PHYSIOLOGY through the seeds of the other. After some days under this arrangement the seeds that were in pure air had grown out into long seedlings (e), while those bathed by the ether-vapour showed no growth at all, without, however, having lost the capacity of germinating in pure air. The brothers Hertwig ('87) have investigated the depressing action of solutions of chloral hydrate upon cell-division in eggs of the sea-urchin. When they let a 0-2—O'S per cent, solution of chloral act for some time (5 minutes—3 hours) upon eggs that were about to develop, cell-division did not go on. Both the nucleus and the protoplasm remained in the stage of division in which they already. l'"iu. lfJ7.—Mimosa pcaUca in ether-narcosis. (After Claude Bernard.) were, while the formation of rays about the centrosomes was com- pletely absent. Only after the eggs had been washed for a considerable time with pure sea-water did the development and division of the cell proceed again. Finally, the phenomena of transformation of energy are also depressed by narcosis. Both the spontaneous production of energy and the capacity of reacting to stimuli are diminished, and finally wholly cease. Among the phenomena of motion Claude Bernard has shown this for the turgescence-movements of Mimosa pudica} If a pot containing a Mimosa be placed under a bell-jar, under which is a sponge soaked with ether (Fig. 167), the spontaneous move. ' CJ. p. 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 Verworn, Max, 1863-1921; Lee, Frederic S. (Frederic Schiller), 1859-1939. London, Macmillan and co. , limited; New York, The Macmillan company
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