124 



TISSUES IN GENERAL. 



are dark violet, in part branching bodies in it, which, send dark 

 violet filaments into the basis-substance, mainly at right angles. 

 Where the tendinous tissue is torn into bundles or single fibers, 

 we easily recognize the dark violet reticulum, and in each single 

 fiber the pale violet basis-substance contains, at irregular 

 intervals, dark violet granules. On the border of some fibrous 

 bundles small scallops protrude. The cross-section of a small 

 bundle shows two kinds of formations: one granular, partly 

 branching, dark violet; the other, homogeneous, colorless, or 

 pale violet. (See Fig. 38.) 



Tissue of the Periosteum. In chromic acid specimens of the 

 periosteum of shaft-bones of grown dogs and cats, the light 



FIG. 38. LONGITUDINAL SECTION OF THE TENDO ACHILLIS OF A GROWN 

 DOG, DEEPLY STAINED WITH CHLORIDE OF GOLD. [PUBLISHED IN 

 1873.] 



P, the branching tendon-corpuscles, with light nuclei ; B, bundle with distinct rectangular 

 dark violet filaments ; F, single dotted fibrillae ; T8, transverse section of a bundle. Magnified 

 800 diameters. 



basis-substance, partly striated, is composed either of rhomboidal 

 plates or of broad ribbons, which may exhibit a mosaic of 

 rhombs. These formations are intermixed and interlaced in a 

 vertical or oblique direction. 



The variety of basis-substance consisting of broad ribbons is 

 met with, as a rule, on the surface of the bone,* while the other 



* The protoplasmic layer between periosteum and bone, which Th. Billroth 

 (Archiv fiir Klinische Chirurgie, Bd. vi.) has termed " cambium," exists in 

 juvenile animals only. 



