Cell therapeutics / by William Addison.

  • Addison, William, 1802-1881.
Date:
1856
Catalogue details

Licence: Public Domain Mark

Credit: Cell therapeutics / by William Addison. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

    28/142 (page 10)
    That the cells of vegetable structure perform in- dependent functions, and that the sensible qualities (taste and smell) of plants are derived—not from the cell-membrane, nor from the nucleus—but from the interior contents, the green granules or granular matter, further appears from the following :—If one of the fleshy leaves of sedum acre be crushed with a drop of water, between two slips of glass, numerous cells with a thin transparent integument, and appa- rently without any nucleus, but which contain an abundance of green granules, will be seen. And the biting quality of the plant seems to reside in the green matter, for in autumn, when the leaves have turned to yellow, the biting quality is lost. In a parti-coloured petal, for example, the garden pansy, each cell may be seen to possess its own colour, without the least intermixture with that of the adjoining ones. Cells filled with a rich purple pig- ment are observed with a microscope in juxta-posi- tion with others filled with a brilHant yellow, and cells with these colours may be seen in apposition with others of a pale primrose, or with others with- out any colour. It is evident from these examina- tions that, differences of colour, and other qualities, Stmcture and Growth of Animals and Plants, page 82—plate 2—figs. 10 and ll.-Syd. Sec. Ed. 1847.