The collected papers of Joseph baron Lister . ^ itdid not appear affected in calibre. This is but one example of what I haveobserved times without The capillaries, though not contractile, are highly elastic, and by virtue ofthis property are capable of considerable variation in capacity, according to thedistending force of the current of blood. Figs. 3 and 4 of Plate III (see p. 68),traced with the camera lucida, show, besides the pigment in two chromatophorouscells of the frogs foot, part of a capillary in nearly extreme conditions in pointof calibre. In Fig. 3 the vessel is about eq
The collected papers of Joseph baron Lister . ^ itdid not appear affected in calibre. This is but one example of what I haveobserved times without The capillaries, though not contractile, are highly elastic, and by virtue ofthis property are capable of considerable variation in capacity, according to thedistending force of the current of blood. Figs. 3 and 4 of Plate III (see p. 68),traced with the camera lucida, show, besides the pigment in two chromatophorouscells of the frogs foot, part of a capillary in nearly extreme conditions in pointof calibre. In Fig. 3 the vessel is about equal in diameter to the length of a redcorpuscle, while in Fig. 4 it is so narrow that the corpuscles in it are pinchedtransversely and elongated. When the capillaries are most distended, theirparietes are much thinner than when shrunk to their smallest dimensions ;an estimate may be formed of the difference by comparing the close proximityof the corpuscles to the outer bounding line of the vessel in Fig. 3 with the con-siderable interval in Fig. 4, that interval representing the apparent thicknessof the wall of the vessel. It is to be observed that
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