— This is an action by Wilmer against the Birmingham Mineral B. B. Co. sounding in damages for personal injuries alleged to have been suffered by the plaintiff while discharging his duties as a brakeman on a freight-train of the defendant company through the negligence of the engineer in the management and operation of the locomotive attached thereto. The train having stalled while running on a high trestle up a very considerable grade and brakes having been applied to hold it in place until another start could be made, the engineer signaled for the brakes to be released. Plaintiff had charge of two brakes. He promptly responded to the signal, and, having released one brake, had reached and was in the act of releasing the other, the.engine meantime being put in motion, when the' momentum of the engine after taking up the slack between the cars nearer to it was comuiunicated to the car *168on which plaintiff was, and brought that into motion with a “jerk”' which threw, or caused the plaintiff to fall off to the ground under the trestle, a distance of forty-five feet, and produced the injuries now complained of.
1. Plaintiff was allowed to testify against objection that the jerk by which his car was set in motion “was an unusual hard jerk,” and this ruling is the subject-matter of the first assignment of error. It is common knowledge, and also shown by the evidence in this case, that the several cars in a' freight-train are brought into motion by a jerk occasioned by sudden taking up of the slack between them as the momentum of the locomotive is communicated from one car to another. Jerking with some degree of violence may therefore be- said' to be generally necessary and incident to the starting of such trains, and the fact that it occurs in a given instance with that degree of violence which is usual under the particular'circumstances as to grade, character of cars, and the like, is no evidence of negligence in setting the train in motion. On the other hand, when this violence is greater than is usually necessary or usually incident to starting under the particular circumstances, it is some evidence of a want of care on the part of the engineer. And there must, of course, be some means, or manner of speech, to 'get this relevant and competent evidence before the jury. Much consideration has failed to disclose to us any practical way for this to be done other than that in which it was done in this case. It would seem to be impracticable for the witness to intelligibly state the degree of violence by measurement of inches and fractions of moments of the suddenness, force and effect of the jerk which is usual, and by similar measurement of the jerk in the particular instance demonstrate to the jury, on the supposition of their belief in his-testimony, that the latter was unusually hard- and sudden, involving some lack of care on the engineer’s .part. It is necessary, we think, that the witness knowing by experience all the elements or factors which make up the usual and- necessary suddenness and force' of this jerking motion, and what suddenness and force would be beyond the line of the usual and necessary, but being unable in the nature of things to lay these factors before the jury, should bemllowed to state as a “short-hand rendering” of, and the only practicable way of deposing to, these integral facts that the motion or jerk “was unusually hard.” — East Tenn., Va. & Ga. R. R. Co. v. Watson, 90 Ala. 41; Louisville & Nashville R. R. Co. v. Watson, 90 Ala. 68.
2. - It is not for us, and was not for the Circuit Court to *169say, whether this testimony had reference to the jerking of freight cars in general in bringing them into motion or to the jerk in this particular instance and under the particular circumstances under which it was made here. That was matter of inference for the jury; and if they found that it had reference to the jerk which it is claimed produced the injury to plaintiff considered with reference to the facts that the train was stalled on a heavy up grade, that the train was itself a heavy one consisting of many loaded cars, and that the witness meant that the jerk was an unusually hard one even ' when measured by these circumstances, this would have been evidence of the negligence charged in the complaint. Moreover it is not disputed that plaintiff was knocked off by or fell off the train in consequence of this jerk. This was itself some evidence for the jury that the jerk was unusually and negligently severe. It surely can not be said to be usual or necessary to jerk a train into motion under any circumstances with such force and suddenness as to hurl employees from the top of it while they, as the jury might have found plaintiff to be, are ordinarily ■ careful and diligent. The testimony of the plaintiff as to the character of the jerk, the fact that he was thrown off or fell off at the time of the jerk, 'and his further testimony as to what he was doing at the time and the manner of doing it, which the jury might have believed, and, believing, found that he was using due care to maintain his position but that notwithstanding this the jerk was so violent as to inflict the injury complained of, was such evidence of the engineer’s negligence • as to require the case to go to the jury. The evidence tending to show due care on the part of the engineer goes only to show that the jerk was not an unusually severe one at the extreme rear oi the train — which might well be true without the evidence of its unusual severity at the point where plaintiff was, midway the train, being at all impugned thereby- — and that the character of the grade, train, &c., were such as to render a hard jerk necessary — and this might well be true, and yet the jerk found to exceed even such necessity. On this state of the case, we are unable to say that “after allowing all reasonable presumptions in favor of the correctness of the verdict, the preponderance of evidence against it is so decided as to clearly convince the court that it is wrong and unjust.” And hence our conclusion that the trial court did not err in overruling the motion for a new trial based on the grounds that the verdict was not supported by the evidence, and was against the evidence. Cobb v. Malone & Collins, 92 Ala. 630.
*1703. The American mortality tables were properly admitted. Their office in the case was to afford data to which the jury might look in connection Avith all other facts in arriving at a conclusion as to the amount of plaintiff’s damages. They were by no means conclusive even as to plaintff’s probable length of life, but they were to be considered along with the other evidence to aid the jury. That the plaintiff was when injured engaged in a more hazardous employment than persons with reference to whom the tables were made up was a circumstance to be taken by the jury as tending to show that plaintiff’s expectancy of life Avas less than the tables would indicate for one of his age, but the tables were none the less admissible on that account.— Vicksburg & Meridian R. R. Co. v. Putnam. 118 U. S. 545 ; s. c. 27 Amer. & Eng. R. R. Cas. 291; L. & N. R. R. Co. v. Frawley, 28 Amer. & Eng. R. R. Cas. 308.
4. It is urged against that part of the court’s general charge to which an exception was reserved only that it is not applicable to the case — is abstract, in other words. This is no ground for a reversal.
5. The charge given at plaintiff’s request had reference solely to the burden of proof on the question of the engineer’s negligence. That his negligence was' an issue in the case, that the burden on that issue was with the plaintiff, and that it was only necessary to discharge this burden that plaintiff should reasonably satisfy the jury of such negligence, are propositions which are not controverted; and this is all the charge contains. It does not even tell the jury that if satisfied of the engineer’s negligence and that it was the cause of the injury without concurring negligence of plaintiff, they should find for plaintff, though it might well have done so.
6. The burden of proof as to contributory negligence is in all cases on the defendant. Plaintiff’s evidence sometimes obviates the necessity of .proof by the defendant that the injury was due to contributory negligence, but even in such case it is inaccurate and misleading to say that the burden is on the plaintiff or is not on the defendant. A charge to that effect is especially pernicious in a case like this, Avhere it was a matter of pure inference to be drawn by the jury whether plaintiff was negligent.or not, and where they found that he was. not negligent as they had a right to do. The necessary indirect effect of charges 3, 4, and 6, requested for the defendant, was to induce the jury to believe that the court meant to instruct them that plaintiff was guilty of contributory negligence. The mere fact *171that there is evidence which tends to prove the affirmative of an issne, no matter from which side the evidence comes, does not as matter of law discharge the onus resting on the party having the affirmative of that issue: the onus is not discharged by any tendency of the evidence which falls short of reasonably satisfying the jury of the facts involved in the tendency. These charges were properly refused.
7. Charge 2 refused to the defendant was ■ confessedly a mere argument intended to answer certain remarks made by plaintiff’s counsel. Its refusal was not erroneous.
8. Nothing is said in argument in support of defendant’s 5th charge; and what we have said above will disclose the grounds of our opinion that the first charge requested by defendant, which required a verdict for the defendant if the jury believed the evidence, was properly refused.
Affirmed.