RETICULAR AND OTHER CONNECTIVE TISSUES 



285 



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Fig. 4 From the subectodermal mesenchyme (corimn) of a fetal pig of about 

 80 mm. neck-breech length, showing blackened fibrils (F) bearing intimate rela- 

 tions to the mesenchymal cells. Bielschowsky stain. Camera lucida; occ. 1, 

 obj. 12 hom. im. 



Fig. 5 Reticular and collaginous tissue at the periphery of a lymphatic gland. 

 Observe the sharp outlines of the fine black reticular fibrils (r) which intermingle 

 with the bundles of collaginous fibers (c/) in a trabeculum. Bielschowsky stain. 

 Camera lucida; occ. 1, obj. 5. 



Fig. 6 The figure exhibits the relation between the collaginous (cf) and reticular 

 (r) fibers in the region adjoining a nodule of a patch of Peyer in the small intestine 

 of man. Note the interlacing of fibers at the border of the lymphoid tissue. 

 Bielschowsky stain. Camera lucida; occ. 1, obj. g. 



blacken; one is justified in assuming that this reaction to the 

 Bielschowsky method, with reasonable care, is constant. 



B. COLLAGINOUS FIBERS 



That the typical reticular fibers of lymphoid tissue and the 

 typical collaginous fibers of dense fibrous tissue take on differ- 

 ent colors after the silver impregnation has been generally 

 recognized, at least by the Italian writers, Levi ('06), Ciaccio 



