674 HUBER. [Vol. XI. 



means of a catgut suture passed through each end of the transplanted seg- 

 ment of the cat's sciatic, and through central and peripheral stumps of the 

 ulnar, in this way bringing the ends of the implanted segment in close 

 apposition with the ends of the ulnar stumps. The divided connective tissue 

 was then closed over the nerve by means of five buried chromatized catgut 

 sutures. The dermis was brought together by means of a continuous silk 

 suture. 

 Examination. — Dec. ii, 1893 (two days after operation). 



The wound was healing by first intention. The central end of the im- 

 planted segment was fixed to the peripheral end of the central ulnar stump 

 by an inflammatory newly formed tissue. The catgut could not be seen. 

 The peripheral end of the implanted segment was fixed to the peripheral 

 ulnar by the suture. The electrical test was not recorded. Cutting the 

 peripheral ulnar with scissors produced contraction of the muscle supplied 

 by the ulnar. 



The nerve was hardened in Flemming's solution, and stained in safranin 

 and licht griin. 



The results of experiments 2, 3, and 4 were essentially the same as in 

 the first experiment. 



Experiment S- — Aug, 10, 1893. 



Small black bitch. Hypodermic injection of § grm. morph. sulph., 

 followed by ether. 



Operatioji. — The right ulnar was exposed, and resected to the extent of 

 5 ctm. The left ulnar was then removed to the extent of 5 ctm., and im- 

 planted between the ends of the resected right ulnar, and fixed by means of 

 a single direct catgut suture above and below, and the wound closed. 

 Examination. — Aug. 14, 1893 (four days after operation). 



The epidermal wound was open for a short distance, the implanted nerve 

 was imbedded in granulation tissue. 



The muscles contracted very feebly on cutting the peripheral ulnar. 



The nerve was hardened in Miiller's fluid, and stained in anilin blue and 

 safranin. 



Experiment 6. — Aug. 10, 1893. 



Large female mastiff. Hypodermic injection of % grm. morph. sulph., 

 followed by ether. 



Operation. — The right ulnar was exposed for 8 ctm., and resected to the 

 extent of 7 ctm. A segment of equal length was transplanted from the left 

 side, and wound closed. 

 Examination. — Aug. 15, 1893 (five days after operation). 



The epidermal stitches had given way. The nerve ends and implanted 

 segment were surrounded by granulation tissue. 



No contraction of the muscles occurred on cutting the peripheral ulnar. 



The nerve was hardened in Miiller's fluid, and sections stained in anilin 

 blue and safranin. 



