1. Error in charging the jury in a civil ease that the burden was upon the party having the burden of proof, to establish his contentions “to a moral and reasonable certainty,” did not require a new trial, where this was followed by full and correct instructions on the law as to the preponderance of evidence and. the burden of establishing such contentions by a preponderance of the evidence, and where the evidence demanded the verdict rendered. Graham v. Mitchell, 78 Ga. 310. See Central Ry. Co. v. McGuire, 10 Ga. App. 483 (
