The authorities are unanimous in holding that the remedy of specific performance is purely equitable in nature. Travel Consultants, Inc. v. Travel Management Corp., 367 F.2d 334, 337 (D.C. Cir. 1966), cert. denied, 386 U.S. 912, 87 S.Ct. 861, 17 L.Ed.2d 785 (1967); Sinclair Refining Co. v. Miller, 106 F. Supp. 881, 885 (D.Neb. 1952). See also 5 Moore, Federal Practice ¶ 38.21, at 179 (2d ed. 1966); 2B Barron and Holtzoff, Federal Practice and Procedure § 875.1, at 43-44 (Rules ed. 1961); 49 Am.Jur. Specific Performance § 2 (1943).