— This case has been once before in this •court, and is reported in 72 Mo. 50. It was then re*605versed and remanded for erroneous rulings upon instructions, and upon a subsequent trial in the circuit court again resulted in a verdict and judgment for plaintiffs, from which defendant appealed. The statement of the case in the former decision was based in part upon evidence introduced by the defendant, especially that of the engineer; but the defendant introduced no evidence on the trial, now under review. With this modification and qualification we deem it unnecessary to make any further statement as to the general facts of the case, and the circumstances under which the boy was killed.
The main grounds relied upon for a reversal of the present judgment grew out of the admission of the plaintiff, Jno. A. Bell, as a witness in the cause; the contributory negligence of the boy and the action of the court in giving and refusing instructions in regard thereto, and especially its said action in giving for plaintiff the following instruction number six:
“6. The jury are instructed that if they believe from the evidence that the engineer in charge of the train saw that the boy did not notice the approaching train, nor hear the alarm whistle, it was his duty to use every means in his power, consistent with the safety of his train, to stop or slack up the speed of his train, so as to prevent injury to the boy, and if he failed to so stop, or slack up the train, when he could have done so, but ran upon and killed the boy, then the jury are bound to find the verdict in favor of the plaintiffs; even though they may believe that the boy may have been improperly on the track, and may have been negligent in standing there without keeping a lookout for an approaching train.”
I. As to the competency of John A. Bell as a witness, as he is a party jointly and equally interested with his wife (who is his co-plaintiff) in the judgment (R. S., 1879, sec. 2121), it is contended that he is disqualified from testifying by virtue of said marital relation, and *606that our statute (sec. 4010, R. S.) was only designed and intended to remove the disqualification of interest, and not that arising from the marital relation. This position is, at least, a plausible one, and the question presents, we think, some serious difficulties in its solution. Our conclusion, however, is against the view presented Uy appellant’s counsel. The reason of the disqualification of husband and wife, at . common law, was, we think, two-fold. Where they were offered for each other they were excluded on the ground of their identity •of interest, and where they were offered as witnesses against each other they were likewise excluded, on the ground of public policy. Fugate v. Pierce, 49 Mo. 444; Southwick v. Southwick, 49 N. Y. 510. Blackstone places this prohibition under consideration upon the .ground of interest, and also, upon the ground of the unity of the person. 1 Bl. Com. 443. But there are many authorities, and they are cited by appellant, which place it, either mainly, or solely, upon the ground of . public policy ; and which fully sustain the appellant’s positions. But in Steffen v. Bauer, 70 Mo. 399, 404, 405, which was a controversy over land, the title to which was in the wife, Steffen, the plaintiff, and the husband, was offered as a witness, to show that his wife signed the deed under compulsion, and acknowledged the same while he was present. The objection that he was incompetent because he was the husband was made, and in the circuit court he was allowed to testify upon the issues affecting his interest alone, but was excluded' upon the issue challenging the trust deed, which issue was supposed to chiefly affect the wife’s interest. After noticing the abolishment, by our statute, of several rules of evidence established by common law and the frequent difficulty of our determining the extent thereof, and declaring that Steffen, husband and plaintiff, was clearly competent, as to his own interests, the court, through . Napton,' J., then say: “ It is obvious * * * that he *607had an interest in the issue as well as his wife, since in the event of her death he would be tenant by the curtesy, and, also had an interest in his wife’s land ■during coverture. * * * The husband, therefore, cannot testify for the wife, on this issue concerning the validity of the trust deed without also testifying for himself, to the extent of his interest. It strikes me, therefore, that the distinction taken by the circuit court * % * is not authorized under our statutes as they now stand.” •
And in the present case, the husband and plaintiff, John A. Bell, testifies in his own behalf, and, at the .same time, testifies necessarily in his wife’s behalf. He is not a nominal or technical party to the record. He is, equally with his wife, the meritorious cause of action, .and had a like beneficial interest with her in the judgment, conferred upon them jointly by the statute. He was, we think, a competent witness under the law as it now stands, and this construction has been adopted acquiesced in, and recognized in numerous decisions by this court, and is the one which best accords, we think, with the obvious intent and purpose of our statutes. Fugate v. Pierce, supra; Steffen v. Bauer, 70 Mo. 404; Cooper v. Orr, 60 Mo. 420; Haerle v. Kreihn, 65 Mo. 202; Buck v. Ashbrook, 51 Mo. 539; Joice v. Branson, 73 Mo. 29; Wood v. Broadley, 76 Mo. 23. The statute may be said to be an expression, and there are many such in our law, civil and criminal, of a modern public policy, changing and abrogating the common law rules of evidence in many and important particulars, and advancing public justice and convenience by allowing and admitting relevant evidence heretofore incompetent, and leaving its credibility and value to be passed upon, and determined as a fact.
II. As to the court’s ruling upon instructions, it is conceded that those given for the plaintiff are, for the most part, the same as upon the former trial, and this is *608further seen and shown by a comparison of the same, as set out in the record, and those set out in the report of the case in 72 Mo. 50. The second omits the word unskillfulness, whose use therein was criticised by this court in its former opinion. In the former decision of the case, instruction numbered seven in the report thereof was declared correct, if the words “by any means in his power” had been qualified by adding “consistent with the safety of the train.” Instruction now numbered six contains the words and qualification thus suggested, and is, in all other respects, substantially the same as said instruction formerly numbered .seven. But it is now urged against the propriety of said instruction that it ignores Athen Bell’s contributory negligence, and directs a verdict for plaintiff, notwithstanding the same, and that it announces a rule that can have no application to a case like this, where the negligence of the injured party, in the language of counsel, ‘ ‘ continues up to and commingles with the negligent act of the defendant in producing the injury,” and this view is put by counsel in many ways, and a great number of authorities are cited in support thereof. The conduct of young Bell, upon the occasion in question, in going upon the rail- ■ road track, when and where he did, and in failing to keep a lookout for passing trains, was, we think, grossly careless and negligent, and such it was held and denominated in the former decision of this case. While this is so, yet, if it is also true that, after the engineer discovered the boy upon the track, under the perilous circumstances stated in the instruction, he could, by the use of every means in his power consistent with the safety of the train, have avoided the injury to the boy, then the defendant is liable, whatever may have been the boy’s antecedent negligence in going upon the railroad, or in being there at the time. On this state of facts, the instruction might properly authorize a verdict, for the doctrine of contributory negligence, is then, we think, *609wholly inapplicable, and it does not then exist as a defence.
The boy’s negligence does not, in that event, as counsel argues, “continue up to, commingle and cooperate with the defendant’s negligence in producing the result.” It has ceased to operate, whenever the engineer discovers his peril and has present ability to prevent the injury. These new elements of time, opportunity,' and ability to render the boy’s negligence harmless, create the duty to do so, and where the power to do this exists, and a -'failure to employ it occurs, then the injury is, in legal contemplation, to be attributed ' thereto, and although the boy’s negligence may have existed, and may have been present at the time, yet it is not then present as a cause of the injury, or as actively contributing thereto, for the injury could have then been avoided, notwithstanding such negligence. This failure to use the means possessed at the time, and adequate to prevent the injury, is, we think, what the books and authorities denominate, in that event, the direct and proximate cause of an injury, and the boy’s negligence is, under the state of facts supposed, an extinct and inactive and inoperative agency or condition in the transaction. If these views of the law are correct, and there was evidence to show the existence of the facts, as submitted, then it follows that the instruction was proper and the giving thereof was not erroneous.
Assuming that the engineer was at his post, and observant of the track, as it was his duty to be, when running his train at such a rate of speed through the station at the town of Meadville, and without intending to stop thereat, the evidence shows that the boy could have been seen by the engineer for the distance of two hundred yards, and perhaps farther. In the absence of his testimony, the exact time when he did, in fact, see the boy on the track, his distance from the engine, and *610the means thereafter used by him, if any, to avoid the injury, must be learned, if at all, from the plaintiffs’ witnesses, and the admitted and necessary facts, circumstances and surroundings attending the transaction. That the engineer was aware of the boy’s presence upon the track and of .his thoughtless condition at the time, or, at least, of his dangerous situation, is plainly shown, or may, at least, be plainly inferred from the fact that the alarm whistle was sounded by him, which was done at a distance from the boy of one hundred and sixty or two hundred feet. The opportunity and ability of the engineer to prevent the injury, and the exertions, if any were made to do so, were, under the circumstances of this case, matters for the consideration and determination of the jury. In the former opinion in this case Napton, J., speaking for the court, says, “the evidence shows, that everything was done by the engineer1, when he ascertained that Athen Bell did not move at the alarm whistle, except to reverse the engine, and the question is, whether the engineer, in simply applying the air brakes, and not reversing the engine, is to be regarded as justified by the circumstances, on the ground that he acted on his judgment which, whether right or wrong, had to be formed instantaneously.”
The jury did not have the benefit of the engineer’s evidence upon this'trial, as to whether or not he reversed the engine and applied the brakes, or as to how promptly he gave the signal, and used, if at all, the means and appliances under his control to prevent the injury, or of his explanation as to why he did not, if he failed to do so, but there was, we think, evidence by plaintiffs’ witnesses, who were bystanders at the station and passengers on the train, and facts and circumstances from which they could find or infer' that the engine was not reversed, or the speed slackened until the boy was struck, and that all the means of stopping the train and avoiding the injury were not used, as promptly, at least, *611as they might and should have been, under the circumstances. There was, we think, evidence of the facts •■submitted in said sixth instruction, and it was for the jury to give it such weight and value .as they might think proper. The further objection to said instruction, that the pleadings did not raise the question of negli.gence after becoming aware of the danger in which the deceased was placed, is not, we think, well taken. It is raised, for the first time, in this court.
The action was brought under the second- section of the damage act, for the death of the son, caused by the negligence and carelessness of defendant’s agents and servants in running, conducting and managing the train and in failing to give signals of its approach. The ■second amended answer was a general denial of the ■allegations of the petition and charged contributory negligence on the part of Athen Bell, and alleges further as follows: “ That defendant, by its agents and employes, conducting, managing and running said engine and train, had the same under full control, and exercised reasonable care and diligence in the management thereof, ■before, and at the time of Athen Bell’s getting struck, ■as aforesaid, in order to prevent the same, and they •could not, by the exercise of reasonable care and. diligence, prevent striking and injuring him, as alleged in ■said petition.”
That question, then, was, we think, raised by these pleadings and was, we think, necessarily involved in the issues thus made, and, further, it is.evidentthat this was the theory of the defendant, in the trial below, as shown by instructions numbered two, three and four, given at his instance and in his behalf. The remaining criticisms ■of counsel upon the other instructions in this case, are, we think, without substance and merit. The instructions, four in number, given on the part of the defendant, with those given for the plaintiff, fairly presented the questions at issue to the jury. We see no error in *612the court’s action thereon, or in the record, and we, therefore, affirm the judgment.