American journal of physiology . e process of cleavage showsthat the treatment of the eggs with KCl increases their power of ad-hesion. The various cleavage cells of a K-egg stick together,while after a treatment with XaCl the cleavage cells adhere much lessto one another and fall apart. The same tendency is produced bythe addition of MgCla to sea-water. It is quite possible that the rela-tive amount of the various ions influences the degree of agglutina-tion in the cleavage cells. Herbst has observed that in sea-waterwithout Ca the cleavage cells of fertilized eggs show a tendency tofall apar
American journal of physiology . e process of cleavage showsthat the treatment of the eggs with KCl increases their power of ad-hesion. The various cleavage cells of a K-egg stick together,while after a treatment with XaCl the cleavage cells adhere much lessto one another and fall apart. The same tendency is produced bythe addition of MgCla to sea-water. It is quite possible that the rela-tive amount of the various ions influences the degree of agglutina-tion in the cleavage cells. Herbst has observed that in sea-waterwithout Ca the cleavage cells of fertilized eggs show a tendency tofall apart.^ ^ , C. : Archiv fiir Entwickelungsmechanik, 1900, ix, p. 424. Artificial Parthenogenesis, 447 It was to be expected that if KCl makes the cells of the sameegg stick together, it might also cause several eggs to know, from the experiments of Driesch ^ and Morgan ^ on theeggs of sea-urchins and of Zur Strassen^ on the eggs of Ascaris, thatif two eggs stick together they may give rise to a single embryo of.
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