The practice of moving for a directed verdict is the modern substitute for the old demurrer to the evidence. The reason for its development at the expense of the older procedure is not far to seek. The demurrer to the evidence was in the first place cumbersome and difficult to draw, for it was required to contain a full written recital of all the facts shown in evidence by the opposite party, together with all reasonable inferences favorable to the party who introduced the evidence.1 The preparation of such a demurrer usually required the expenditure of much time and labor.
Sunderland, Edson R. "Directing a Verdict for the Party Having the Burden of Proof." Mich. L. Rev. 11 (1913): 198-209.