TISSUES IN GENEEAL. 



123 





the dark-brown, border of which is vertically perforated by light 

 lines, while the surrounding basis-substance looks uniformly 

 brown and homogeneous.* Toward the periphery, the light 

 fields are larger and often longitudinally forked; in the peri- 

 tendinous tissue they are very numerous, many-shaped, and 

 separated by narrow, brown fields, or streaks of the basis- 

 substance. 



High amplification shows that from the periphery of the light 

 fields and their offshoots delicate light lines arise in a vertical 

 direction, which blend with a varicose reticulum throughout the 

 basis-substance, and thus connect each larger uncolored field 

 with its neighbors. (See Fig. 37.) 



FIG. 37. LONGITUDINAL SECTION OF THE TENDO ACHILLIS OF A GROWN 

 DOG, STAINED WITH NITRATE OF SILVER. [PUBLISHED IN 1873.] 



S l , light brandling field, with a pale, dim nucleus ; $ 2 , offshoot of a light field in the 

 middle of basis-substance ; 3, bifurcation inclosing a narrow peg of basis-substance ; S, dark 

 brown basis-substance pierced by a mostly rectangular light reticuluni. Magnified 800 

 diameters. 



Slight gold tinction reveals the identity of the pale violet 

 bodies with the protoplasmic corpuscles seen in chromic acid 

 specimens ; they are identical, as regards their shape, also, with 

 the negative fields obtained by silver tinction. t After intense 

 gold-stain, the striated basis-substance looks pale violet. There 



* V. Eecklingliausen (7. c. ) also has observed anastomosing light fields in 

 the silver-stained tendon. 



t In this respect I concur with Giulio Bizzozero (Rendiconti del R. Isti- 

 tuto lomb. delle scieiize, 1869) and Paul Giiterbock (Centralblatt fiir die 

 Med. Wissensch., 1870). 





