Opinion by
Mr. Justice Potteb,After taking ample time to consider carefully all the testimony in this case, the learned judge of the court below reached the conclusion that the evidence was not sufficient to establish any fact which could fairly be deemed negligence upon the part of the defendant company. He therefore entered judgment for the defendant, notwithstanding the verdict. As the trial judge says, the burden of plaintiff’s contention is, that the accident was due to the negligence of the defendant in allowing the derailing switch to be out of repair. Evidence as to any faulty construction was lacking, and there was nothing to show that the switch was not such an one as is generally used for the purpose. The testimony of the section foreman and the track walker shows that the switch was inspected the day before the accident and was found in good condition and working properly. The undisputed evidence of other trainmen showed that the device was in good order, within an hour and a half of the accident, and that one train and another engine east bound, passed through it without, any difficulty. The only testimony that appears in the case tending to show that the switch was out of order, was that of the witness Kindle, who saw the condition of things only at the moment of the accident. We have searched the record in vain for any evidence, prior to his observations, to show that the derailing switch was not in good condition and working properly. It is unnecessary to say that, in order to recover, the plaintiff was bound to show by affirmative proof, the cause of the accident, and that it resulted from some negligent act on the part of the defendant. Counsel for plaintiff place great stress upon the fact that there was testimony to show that, after the accident, a nut was found broken off the derailing switch, and that the absence of this nut prevented the switch from working properly. But it was not shown how, or'by whom, or how long before the accident, if at all, the nut was broken off. Plaintiff’s husband was not an employee of the defendant company, but was at the time in the service of another *326railroad lawfully using the tracks of the defendant. We assume, however, that it owed to him the same degree of care as that which it was obliged to exercise for the protection of its own trainmen. The rule of law is plain, that “it is not enough to show that the defect existed at the moment of the accident. It must also appear that the master had an opportunity of previous knowledge, or that the facts were such that he ought to have known of the defect:” Mixter v. Coal Co., 152 Pa. 395. That much must be shown in order to convict him of negligence in failing to repair.
The language used by this court in Mensch v. Penna. R. R. Co., 150 Pa. 598, 610, is very appropriate to the facts here shown. “A nut may wear off from a bolt by the ordinary usage of travel, or it may be forced off by rough handling in the movement of the train, but for this alone there is no liability to an employee, because it is one of the risks of the business. If an opportunity to discover the defect were shown to have existed, and no attempt to repair was made, then a condition of liability would arise which in the absence of exculpatory proof would justify an inference of culpable negligence. The same would be true if a prior actual discovery of the defect had been shown. But the difficulty of the case, as it seems to us, is, that there is no proof of either of these contingencies, and in the absence of such proof the case for the plaintiff can only be adjudged by conjecture.”
Our examination of all the testimony leads us to agree with the conclusion reached by the trial judge, that there was not sufficient affirmative proof of negligence upon the part of the defendant to justify the submission of the question to the jury.
The assignments of error are overruled, and the judgment is affirmed.