Evidence which is positive, precise and explicit, as opposed to ambiguous, equivocal, or contradictory proof, and which tends directly to establish the point to which it is adduced, instead of leaving it a matter of conjecture or presumption, and is sufficient to make out a prima facie case. Mortgage Co. v. Pace, 23 Tex. Civ. App. 222, 50 S. W. 377; Revnolds v. Blaisdell, 23 It. I. 10. 49 Atl. 42; Ward v. Waterman, 85 Cal. 488. 24 Pac. 930; Jermyn v. MeClure, 195 Pa. 245, 45 Atl. 93S; Winston v. Burnell. 44 Kan. 307, 24 Pac. 477, 21 Am. St. Rep. 2S9; Spencer v. Colt. SO Pa. 318; People v. Wreden, 59 Cal. 395