Remarks on Quekett's Histology, On Kölliker's Human histology, and on the physiological importance of the nucleus of the cell / by Martin Barry, M.D.

  • Barry, M. (Martin), 1802-1855.
Date:
[1854]
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Licence: Public Domain Mark

Credit: Remarks on Quekett's Histology, On Kölliker's Human histology, and on the physiological importance of the nucleus of the cell / by Martin Barry, M.D. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    12. The axile fibre of nerves has a structure sometimes giving it transverse striatiou and a crenate edge. 13. The white substance of nerves has a structure giving it ox'iginally transverse striation. 14. A mother-cell is sometimes seen divided into two compart- ments by two daughter-cells, whose walls are composed of fibre, and where in contact with one another form a thick septum. Is there to be found among the figures given by Professors Quekett or Kolliker anything like a confirmation of these facts? 1. The nucleus neither remains inert nor is absorbed as useless after the formation of the membrane of the cell.—Phil. Trans. 1840. Compare with the following by Kolliker in 1853:—Both kinds of cell-formation agree in this, that the cell-nuclei play a veiy im- portant part, and appear to be the proper centres of development (^Bildungspunkte) of the yoimg cells.—Lc. p. 19. 2. The cell is propagated by division of its nucleus.—Phil. Trans. 1840. Compare with the following by Kolliker in 1853:— The first thing to be observed in this case (the development of cells within other cells,), in the parent cell, is a metamorphosis of its nucleus, which grows, acquires two nucleoli, becomes elongated, and divides into two.—ic. p. 22. 3. This division of the nucleus is initiated by division of the nucleolus.—Phil. Trans. 1840. Compare with the following by Kolliker in 1853 :— Cell-nuclei are produced endogenously in nuclei, or by their division under the influence of a nucleolus, which also divides,—Lc. p. 33. 4. Fibre is originally flat and marked loiih strice, and it has origi- nally a crenate edge.—Phil. Trans. 1842. More than two hundred drawings from nature. Compare with Quekett's fig. 23, of a moniliform fungus occupying many of the cells, and threading its way between others, in diseased potato. Compare also with his fig. 127 from an enchondroma. In the latter his concentric laminated deposit appears to consist of my flat striated fibre. See, besides, Quekett's fig. 103 b. of striated fibres from the ligamentum nuchaj of the giraffe. He men- tions having seen striated fibres also in the rhinoceros and the sheep, and even in arteries. (Among my figures will be found one of an artery from the pia mater with two strata of striated fibres, the inner sti'atum longitudinal and the outer stratum being a spiral fibre transversely crossing these. Phil. Trans. 1842. Plate VI., fig. 16.) Compare with the following remark of Kolliker:— The margins of the elastic fibres are in general quite rectilinear, but in some rare