130 



TISSUES IN GENEEAL. 



4CF. 



puscles, as well as to proceed from the medullated and non- 

 medullated nerve-fibers, and to traverse the light rim around all 

 these formations. 



The same structure is visible in the ganglionic corpuscles of 

 the sympathicus nerve of the rabbit. Here the spokes directly con- 

 nect corpuscles lying 

 near each other, and 

 penetrate also the inter- 

 stice between the cor- 

 puscles and the cap- 

 sule, being lost to sight 

 in the latter. 



The pale protoplas- 

 ma of the nervous sys- 

 tem, as is well known, 

 is easily stained violet 

 with solutions of chlo- 

 ride of gold, and such 

 solutions, cautiously ap- 

 plied, furnish a valua- 

 ble means more plainly 

 to bring to view the 

 features of the struct- 

 ure of nerve-elements 

 described. 



Epithelial Tissue. 

 The forms of the so- 

 called " prickle and 

 ridge cells n are known in many epithelia ; they have been first 

 described by Max Schultze * as normal occurrences in the pave- 

 ment epithelia of the skin, the lips, the mucosa of the oral 

 cavity, the tongue, and the conjunctiva of the eyelids. The 

 thorns are nothing but offshoots of an epithelial corpuscle, which 

 traverse the light rim of cement-substance to join all the neigh- 

 boring corpuscles. The thorns are conical. They are either so 

 arranged that from one element alternately the broad base of a 

 cone projects, and the next thorn is inserted with its point into 

 the element j or, as Bizzozero has demonstrated, the points of the 

 thorns projecting from two neighboring corpuscles meet in the 

 rim of the cement-substance. 



Owing to these offshoots, the cement-substance, if cautiously 

 stained brown by nitrate of silver, is pierced by transverse light 

 * Centralblatt fiir die Mediz. Wissenschaften, 1864. 



FIG. 44. SURFACE-EPITHELIUM OFAVILLUSOF 

 THE SMALL INTESTINE OF A GROWN DOG. 

 SLIGHT GOLD STAIN. [PUBLISHED IN 1873.] 



EL, columnar epithelia in side view ; EF, columnar epi- 

 thelia in top view ; ML, epithelium transformed to mucus, 

 in side view ; M. F, same in top view ; 8, the striated seam 

 of the epithelia. Magnified 800 diameters. 



