Proof of injury from running of train as prima-facie evidence of lack of reasonable skill and care

In all actions against railroad companies for damages to persons or property, proof of injury inflicted by the running of locomotives or cars of such companies shall be prima-facie evidence of the lack of reasonable skill and care on the part of the servants of the companies in reference to such injury. (Ga. L. 1929, p. 315, § 1; Code 1933, § 94-1108.)