684 HUBER. [Vol. XI. 



Jan. I, 1894. Wound nearly healed. 



Feb. I, 1894. Dog used the foot in walking, sometimes touching the 

 floor with the plantar surface of the foot, at other times with the dorsum of 

 the foot. He used the foot in walking up stairs, but often did not reach 

 far enough, and missed the step. 

 Exarnmation. — Feb. 7, 1894 (fifty-four days after operation). 



Electrical stimulation of central sciatic above bone tube, even with strong 

 stimulus, produced no movement in the muscles supplied by the sciatic. 

 The same results were obtained when the peripheral sciatic was stimulated 

 below the bone tube, and when the internal and external popliteal branches 

 were stimulated. 



No contraction resulted from cutting the central sciatic. 



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

 safranin. 



Experiment 31. — Jan. 24, 1894. 



White and brown spaniel. Hypodermic injection of f grm. morph. 

 sulph. 



Operation. — A segment 6 ctm. long was removed from the right ulnar, 

 the cut ends inserted within the ends of a bone tube, and sutured. Wound 

 closed. 

 Examination. — May 5, 1894 (121 days after operation). 



The end of the central stump was slightly enlarged. 



Electrical stimulation : — 



(i) Stimulation of ulnar below bone tube at 5 ctm. S. C. produced slight 

 evidence of pain, as shown by feeble reflexes, but no movement in muscles 

 supplied by ulnar. 



(2) Stimulation above the bone tube caused no movements. There was 

 no contraction of the muscles supplied by the ulnar when the nerve was cut 

 with scissors central to the bone tube. It would seem that a few sensory 

 fibres had reached the peripheral ulnar. 



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

 safranin. 



Experiment 32. — Dec. 13, 1893. 



White bulldog. | grrn. morph. sulph. injected. 



Operation. — The right sciatic was exposed, and 5 ctm. exsected. The 

 cut ends of the nerve were placed into the ends of a bone tube, retained in 

 place by catgut sutures, and wound closed. 



Dec. 18. Greater portion of the wound healed by first intention. 



Jan. 1894. Extensive ulcer on the dorsal surface of the right hind foot, 

 and the toes red and swollen. In walking the dog dragged this foot, and 

 when used for support touched the floor with the dorsal surface. 



Feb. 15. No improvement in utility and appearance of the foot. 



