Pirate III 
Fig. 14 Cross-sectionof the spinal cord in the region of the 15th nerve of Experiment 538. The 
inner margin of the motor nucleus is marked on each side by a cross. The Jength of the posterior 
horn from A to B is also decreased on the operated side. 
Fig. 15 Cross-section of the spinal cord in the operated region of Experiment 206. Inner margin 
of motor nucleus marked by a cross. 
