688 HUBER. [Vol. XI. 



ulnar ; reflexes feeble. Contraction not so marked after the central ulnar 

 was cut. 



(2) Stimulation of central ulnar just above catgut suture, after it had 

 been divided at a point about 6 ctm. above suture, excited muscular move- 

 ment at 12 ctm. S. C. 



(3) Direct stimulation, at 9 ctm. S. C, of muscular branch to flex. carp, 

 ul. excited feeble contraction of this muscle. 



(4) Stimulating the peripheral ulnar in forearm caused no contraction. 



(5) Stimulation at 12 ctm. S. C. of a narrow band, presumably a new- 

 formed nerve trunk extending from central to peripheral ulnar, caused 

 strong contraction of flex. carp. ul. 



(6) Cutting the central ulnar, peripheral ulnar, and muscular branch to 

 flex. carp, ul., with scissors, excited strong contractions. 



The physiological examination leads to the conclusion that the new nerve 

 fibres had reached the upper portion of peripheral ulnar and the muscular 

 branch to flex, carp ul., but as yet had not grown any distance down the 

 peripheral stump. 



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

 safranin. 



Experiment 40. — Dec. 20, 1893. 



Large black mongrel. Hypodermic injection of | grm. morph. sulph., 

 followed by ether. 



Operatiott. — The ulnar of the left side was resected 5 ctm., and a bundle 

 composed of eight No. 3 catgut threads implanted, sutured to the resected 

 ends of the ulnar, and wound closed. 

 Examination. — May 5, 1894 (136 days after operation). 



(i) Stimulating with strong induction current of peripheral ulnar below 

 the catgut bundle excited no reflexes and no contraction of muscles supplied 

 by ulnar. 



(2) Stimulating central ulnar after severing the nerve 5 ctm. above the 

 implanted catgut bundle caused no contraction. 



(3) Cutting the central ulnar, peripheral ulnar, and muscular branch to 

 flex. carp, ul., excited no contractions. 



Conclusion. — No return of function to sensory or motor fibres in the 

 peripheral ulnar. 



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

 safranin. 



Experiment 41. — Dec. 2, 1893. 



Shepherd dog. Hypodermic injection of | grm. morph. sulph., followed 

 by ether. 



Operation. — The left ulnar was resected to the extent of 4 ctm., and a 

 catgut bundle implanted and sutured above and below to the resected ulnar. 

 Wound closed. 

 Examination. — May 30, 1894 (152 days after implantation). 



