ON T1IK MAMMALIAN NERVOUS SYSTEM. 



523 



(3.) After Previous Operations on Cord. 



Cat (227) division of left posterior roots . 



(227) . . 



,, (230) division of right posterior column . 



,, (230) 



(247) 



,, (251) division of botli posterior columns . 



(259) left hemisection 



(259) 



007 left 

 009 right 

 008 left 

 005 right 

 012 right 

 012 right 

 009 left 

 008 right 



II. LUMBAR ROOTS. 

 7 th Left Lumbar Posterior Root, 



Cat (341) -026 



(348) -02 



(362) -02 



Cat (381) -OL8 



(382) -01G 



Average 02 Daniell. 



6th Lumbar Posterior Root. 

 Cat (383) -Oil 



Gth Lumbar Anterior Root. 

 Cat (383) 0045 



III. SPINAL CORD. 



ELECTRICAL Difference between Cross Section arid Surface. Cord Divided and 

 Isolated at Position Indicated in Table. Contacts 1 centim. apart. 



(1.) Cord in Connection with Brain 



Cat (51) 1st lumbar .... -033 



(80) 12th dorsal .... 044 



(97) 12th dorsal .... -03 



,, (114) 2nd lumbar . . . -037 



(118) 4th lumbar. ... 01 



(124) 3rd lumbar. . . . -046 



(120) 2nd lumbar ... -04 



(288) 13th dorsal .... 033 



,. (308) b t lumbar . . . . 033 



(314) 12th dorsal .... 025 



(315) 13th dorsal .... -082 



(317) 13th dorsal .... 032 



(319) 12th dorsal .... -029 



(323) 13th dorsal. . . . -031 



(324) 13th dorsal .... -033 

 Average 034 Uaniell. 



Monkey (41) 12th dorsal . . 

 (48) 12th dorsal . . 

 (52) 12th dorsal . . 

 (54) 12th dorsal . . 

 (234) 12th dorsal . 

 Average 025 Daniell. 



018 

 024 

 029 

 027 

 025 



:: x 2 



