The cell in development and inheritance / by Edmund B. Wilson.

  • Edmund Beecher Wilson
Date:
1902, ©1900
Catalogue details

Licence: Public Domain Mark

Credit: The cell in development and inheritance / by Edmund B. Wilson. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

    101/522 (page 73)
    tory and apparently irreconcilable results. Fol ('79) derived the spindle from the nuclear material, the asters from the cytoplasm. Strasburger ('80) asserted that the entire achromatic figure arose C D Fig. 27. — The prophases of mitosis (heterotypical form) in primary spermatocytes of Salamaudra. [Meves.] A. Early segmented spireme; two centrosomes outside the nucleus in the remains of the attraction-sphere. D. Longitudinal splitting of the spireme, appearance of the astral rays, disin- tegration of the sphere. C. Early amphiaster and central spindle. D. Chromosomes in the form of rings, nuclear membrane disappeared, amphiaster enlarging, mantle-fibres developing. from the cytoplasm, and to that view, in a modified form, he still adheres. Flemming ('82), on the whole, inclined to the opinion that the achromatic figure arose inside the nucleus, yet expressed the