No. 3.] PERIPHERAL NERVES. 687 



the implanted bundle, come up over and form a sheath or a cuff around the 



ends of the nerve stump. The form of the catgut bundle, and the manner 



in which it was united to the resected nerve ends is shown in Fig. 2. The 



wound was closed by stitching the subcutaneous connective tissue over the 



implanted catgut, and closing the dermal incision with interrupted silk 



sutures. 



Exa7nmation. — June 4, 1894 (five days after operation). 



Wound nearly healed by first intention. On opening the wound the cat- 

 gut bundle was found imbedded in a mass of granulation tissue, and when 

 isolated, was found to be quite firmly united to the central and peripheral 

 portion of the resected nerve by means of granulation tissue. 



Stimulation of the peripheral ulnar with strong induction shocks excited 

 no movements in the muscles supplied by ulnar. No contraction was 

 observed when the nerve was cut with scissors. 



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

 and licht griin. 



The same results were obtained in experiments 36 and 37. 



Experiment 38. — April 20, 1 894. 



Small black bulldog. § grm. morph. sulph. 



Operation. — The ulnar of the left side was exposed, and 5 ctm. 

 removed. In this case the central and peripheral ends of the nerve were 

 united by a long catgut suture, carried forward and backward three times, 

 and at each turn the catgut thread was passed through the nerve stump, 

 Assaky's suture k distance. The wound was then closed. 

 Examination. — May 30, 1894 (39 days after operation). 



Wound healed. Physiological tests as follows : — 



(i) Stimulation of the peripheral ulnar below the catgut threads with 

 strong induced current gave no contraction of the muscles and no reflexes. 



(2) Stimulation of the central ulnar above the implanted catgut bundle 

 excited no contractions. 



(3) Cutting the nerve with scissors excited no contraction of muscles 

 supplied by ulnar. 



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

 safranin. 



Experiment 3g. — Jan. 25, 1894. 



Brown mongrel. | grm. morph. sulph., followed by ether. 



Operation. — A segment 5 ctm. in length was removed from the left 

 ulnar, the resected ends united by suture k distance, and wound closed. 



Jan. 31. Wound healing by first intention. 

 Examination. — June 8, 1894 (136 days, four and a half months, after 

 operation). 



Peripheral end of central stump terminated in a large bulb. 



(i) Stimulation of peripheral ulnar just below catgut suture with induced 

 current at 12 ctm. S. C. excited strong contraction of muscles supplied by 



