ABSTRACT
Measurements of the consistency of the protoplasm by following the movement of cellular granules under centrifugal force have been made in various materials (e.g. for cytoplasm, Heilbrunn, 1928; Heilbrunn & Wilson, 1948; Allen, 1960; for cortex, Brown, 1934; Wilson, 1951; Zimmerman, Landau & Marsland, 1957). In amphibian eggs such measurements were performed by Konopacka (1908) and Ödquist (1922) on the cytoplasm and by Selman & Waddington (1955) on the cortex. However, since the observations of the latter authors were restricted to dividing eggs, a report on the cortical consistency of uncleaved amphibian eggs determined by the centrifugal method is not available.
Copyright © 1967 by Company of Biologistss
1967
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