Huber-DeWitt, Ncuro-tciidi7io2is End-organs. i6i 



and a nerve network in the musculus sterno-radialis of the frog. 

 After describing in detail the procedure used for exposing and 

 removing the muscle and the methods employed in bringing to 

 view the nerve fibers and endings (dilute hydrochloric acid, ni- 

 tric acid, osmic acid and gold chloride), the author describes a 

 plexus of meduUated fibers and a termination which he desig- 

 nated as '* Nefvenschollm-" These endings, he states, are in 

 the substance of the tendon and have many points of resem- 

 blance with the end-plates of striped muscle fibers. That Rollet 

 had before him the neuro-tendinous endings of the frog, can 

 hardly be questioned from his description and from the figures 

 given. The methods employed by him revealed, however, lit- 

 tle else than the meduUated portions of the nerve fibers going 

 to this ending. 



Contemporaneously with the above communication, ap- 

 peared one by Sachs, who, at the instigation of Kvihne, in whose 

 laboratory the research was carried on, examined tendons of the 

 frog, salamander, sparrow, rat and cat. In the frog, nerve 

 fibers were found in the musculus sterno-radialis and musculus 

 semi-tendinosus. In the salamander, nerve fibers were found 

 in several tendons ; in the sparrow, the leg and wing tendons 

 were examined with negative results. In the mouse, nerve 

 fibers were readily demonstrated in the long tendons of the tail, 

 near the insertion of the muscle fibers into these tendons, and 

 also in the diaphragm ; in the cat also in the tendons of the tail 

 and a few in the patellar tendons. In these tendons, cleared in 

 dilute mineral acids, the nerve fibers could be traced until they 

 lost their medullary sheaths and the figures given by Sachs 

 show that he recognized the branching of meduUated fibers in 

 the nerve-ending in question. 



With the gold chloride method, this investigator obtained 

 a number of preparations, especially from the salamander and 

 frog, which he interpreted as showing the ultimate ending of 

 the nerves in tendon. Several types of endings are mentioned : 

 one in which the meduUated nerves end in an interlacing net- 

 work of fine fibers, ("Die markhaltigen Endzweige der Faser 



