118 



TISSUES IN GENERAL. 



from the medullary corpuscles, pass through the rim into the basis- 

 substance. Where the medullary corpuscles are near the border 

 of a vessel, their offshoots traverse the light, perivascular rim 

 and inosculate with the wall of the blood-vessel. * 



Upon slight gold tinction of chromic acid specimens previously 

 exposed to water, the spokes exhibit a distinct violet color. The 

 longer the solution of gold acts, the more distinct will be a differ- 

 entiation in the basis-substance. The protoplasmic lumps at last 

 appear as dark violet, densely reticular corpuscles with numerous 



FIG. 33. MEDULLARY TISSUE FROM A LONGITUDINAL SECTION OF THE 

 FEMUR OF A NEW-BORN PUP. CHROMIC ACID SPECIMEN. [PUBLISHED 

 IN 1873.] 



B, bone-corpuscle; pi, vacuolecl plastid ; PZ, reticular nucleated plastid; M, apparently struct- 

 ureless basis-substance ; C, capillary blood-vessel. Magnified 800 diameters. 



delicate radiating spokes, which blend with a partly coarse, partly 

 delicate, reticulum. (See Fig. 34.) 



* Confr. "Ueber die Kiick- und Neubildung von Blutgefassen im Knochen 

 und Knorpel." Med. Jahrbiicher, 1873. 



