THE Silver Gilt Christening Font, made for Charles II.
Silver-Gilt Altar Dish, used at Christmas and Easter in the Chapel of St Peter ad Vincula, Tower of London.
2.-Queen Elizabeth'S Salt-Cellar.
THE GOL u Salt-Cellar presented to the Crown by the City of Exeter.
Silver Gilt Altar Dish, dated 1660, with representation of the Last Supper; it forms part of the Altar plate at the Coronation and is in the custody of the Sub-Dean of the Chapels Royal.
THE Wine Fountain, presented to Charles IL by the Corporation of Plymouth.
so as to give rise to structures which in normal development they would not have formed.
It is clear that there are at least three kinds of factors involved in regeneration. There are: (I) Regenerations due to the presence of undifferentiated, or little differentiated, cells, which have retained the normal capacity of multiplication when conditions are favourable. (2) Regenerations due to the presence of special complicated rudiments, the stimulus to the development of which is the removal of the fully formed structure. (3) Regeneration involving the general capacity of protoplasm to respond to changes in the surroundings by changes of growth. The most general view is to regard regenerations as special adaptations; and A. Weismann, following in this matter Arnold Lang, has developed the idea at considerable length, and has found a place for regenerations in his system of the germ-plasm (see Heredity) by the conception of the existence of "accessory determinants." Hertwig, on the other hand, attaches great importance to the facts of regeneration as evidence for his view that every cell of a body contains a similar essential plasm.
In E. Schwalbe's Morphologie der Minbildungen (1904), part i. chap. v., an attempt is made to associate the facts of regeneration with those of embryology and pathology. Our knowledge of the facts, however, is not yet systematic enough to allow of important general conclusions. The power of regeneration appears to be in some cases a special adaptation, but more often simply an expression of the general power of protoplasm to grow and to reproduce its kind. It has been suggested that regenerated parts always represent ancestral stages, but there is no conclusive evidence for this view. (P. C. M.)
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