“…Until the finer histological methods and stains were made available, only sporadic and unconfirmed reports of spinal cord regeneration in mammals were made (Dentan, 1873;Eichhorst and Naunyn, 1874;and Stroebe, 1894). Cajal ('06, '28) sectioned the spinal cord in cats and found numerous young fibers 20 days later at the ends of proliferating nerves.…”