1. Evidence — Public Policy. — In a suit against a railway company for damages for overflow of land occasioned by the erection of an embankment which diverted the natural flow of surface water, and caused it to overflow and damage plaintiff's land, where it is alleged that defendant built said embankment across a branch, and left an insufficient opening in said embankment at the crossing of said branch, it was held error to admit testimony that the defendant, after the overflow, enlarged its trestle and opening through said embankment. Upon principle, as well as public policy, such evidence ought not to be admitted. See opinion for reasons.
2. Evidence — Opinions of Witnesses not Experts. — In such case a witness, not an expert, having testified to facts derived from personal observation, may testify that in his opinion defendant's embankment caused the overflow of plaintiff's land. See authorities.
3. Overflow — Measure of Damages — Growing Crops. — The only correct criterion for ascertaining the value of a growing crop at any period of its existence, is to prove what that character of crop was worth at or near the place where it was grown, when there is to be made proper estimates and allowances, from ascertained or ascertainable facts, for the contingencies and expenses attending this from care and cultivation.
4. Same — Permanent Injury. — When the act complained of takes a part of or affects a change in the realty itself, the measure of damages to the land is the difference between the market value of the land at and just before the time of building the railway, and the market value of the same after the injury is done; but where the damages consist in rendering the land liable to overflow in the future, it is such as may or may not occur, and the liability is such as may or may not be removed by the construction of additional culverts for the water, then the character of damage is in its nature uncertain, and can not be recovered until the injury actually occurs; and each separate injury renders the party at fault liable for such injury as may then occur.
5. Hearsay Evidence. — The testimony of plaintiff, that the engineer in charge at the time of the construction of the trestle told him that the opening was insufficient as an outlet for the water, but that he could make it no larger because his superior engineer would not let him put in a wider trestle, was inadmissible, because it was not a part of the res gestæ, and does not come within any exception allowing the admission of hearsay testimony.