MR. JUSTICE HOLLOWAY

delivered the opinion of the court.

Upon the trial of this cause, the court sustained a motion for a nonsuit and directed a judgment dismissing the complaint. From that judgment and from an -order denying a new trial these-appeals are prosecuted.

The plaintiff was a passenger for reward upon defendant’s train from Belgrade to Bozeman. When the train had stopped *111at the station platform in Bozeman, the brakeman placed a step-box in proper position on the platform to enable passengers to embark and alight conveniently. When plaintiff stepped upon the step-box in leaving the train, her foot slipped and she fell, sustaining the injuries of which she complains. The charge of negligence is that at the time the step-box was placed in position on the platform and at the time plaintiff stepped upon it, it was “in a slippery, icy, unsafe and dangerous condition," which fact was known to the carrier or in the exercise of due care should have been known to it; that such condition was unknown to plaintiff and was the cause of her fall and injury. All the allegations of negligence were put in issue by the answer.

Upon the trial the plaintiff testified: “The way the accident happened to me was that I was coming down the steps and I held to the rod with my left hand, and as I stepped with my right foot on the lower step, I reached my hand to the brakeman, and when I put my foot down on to the foot-box, I noticed a piece of ice and before I could stop myself I stepped and my foot slid and turned; it slid off the box and I crushed up to the ground. It was my left foot that I stepped on to the box with. I tried to avoid the piece of ice on the box and I couldn’t do it because I had started to make my step. The piece of ice was about the size of a silver dollar; it might have been larger or at might have been smaller. The piece of ice on the box was either loose or else my shoe loosened it as my foot slid. The brakeman had hold of my hand as I stepped. I fell full length on .the platform. ” The brakeman, called as a witness for the'plaintiff, testified: “I don’t know whether I would have seen any ice on the step-box at the time when she stepped upon it or not. It could have possibly been there and I not see it. If it had been there and I had seen it, it would have been my duty to have removed it. * * * There was no ice on the step-box when I put it down. I never saw any on it at any time after that.” He testified further that it was his duty to assist passengers in getting on *112and off the car by extending his hand to each one, and that it was not possible to discharge his duty and keep his eyes on the step-box constantly; that passengers in alighting follow each other as closely as possible and that at the time of the accident quite a few persons got off ahead of the plaintiff. The conductor of the train, also a witness for plaintiff, testified generally as to the duty of the brakeman in assisting passengers; that he has charge of the step-box; that it is-his duty to see that it is in proper condition for use and properly placed. He testified further: ‘ ‘ Q. That step-box is right under his. eye all the time? A. Yes, just in front of Mm. It is just in front of him all the time/ Just in that condition [indicating]. He is not looking at -the step-box all the time because his attention has to be directed to the passengers coming down the steps.” This is a fair summary of all the evidence which reflects upon the question of negligence.

Counsel for plaintiff, in concluding his brief, insists that, having shown the injury and the cause of it, a prima facie ease of negligence was made out; and a few decided cases from other jurisdictions are cited which, in principle, lend support to the contention, but the subject has been covered thoroughly by our own decisions and, since they are in harmony with the overwhelming weight of authority and are grounded in sound reasoning, we are not disposed to depart from them.

The doctrine of the maxim res ipsa loquitur is applied to [1] passenger cases to this extent: Whenever the injury results from some vice or defect in the appliances or operative mechanism of the means of transportation or from the movement of trains, proof of the injury and the cause of it raises a presumption of the carrier’s negligence, as where the injury results from the overturning or derailment of a coach or the collision of trains. The reason for the application of the rule in such eases has its foundation in the fact that the instrumentalities of carriage are within the exclusive control and management of the carrier whose duty it is to know that they are in proper condition to render the service required by law, *113whereas the passenger is without the means of, ascertaining the presence or defects which cause the injury, or, if he should know of them, he is ordinarily in no position to avoid the consequences. The following cases illustrate the rule: Pierce v. Great Falls & C. Ry. Co., 22 .Mont. 445, 56 Pac. 867; Dempster v. Oregon Short Line R. Co., 37 Mont. 335, 96 Pac. 717; Hoskins v. Northern Pac. Ry. Co., 39 Mont. 394, 102 Pac. 988; Emerson v. Butte Electric Ry. Co., 46 Mont. 454, 129 Pac. 319. [2] Though our statute (sec. 5300, Rev. Codes) imposes upon the carrier the duty to exercise toward the passenger for hire, the highest degree of care, it is but declaratory of the common law and does not constitute the carrier an insurer of the passenger’s safety. (Taillon v. Hears, 29 Mont. 161, 1 Ann. Cas. 613, 74 Pac. 421.)

The right to recover for personal injury is grounded in negligence and the burden of pleading and proving negligence is upon the injured party. Whenever, therefore, the injury [3] results from something' over which the carrier has not the exclusive control, the rule of ordinary negligence obtains, and the burden is upon the passenger to show that the presence of the cause-of the injury is attributable to the carrier’s negligence. Speaking generally, the doctrine of the maxim res ipsa loquitur cannot, from the very nature of the case, have any application to injuries received by a passenger while alighting from a standing train. (Knuckey v. Butte Electric Ry. Co., 41 Mont. 314, 109 Pac. 979.)

In the present controversy no 'contention is made that [4] the step-box, of itself, was the cause of the accident; that it was in a defective condition; that it was improperly constructed or that it was not adapted to the use for which it was designed and employed. Plaintiff .was the only witness who testified to the presence of ice on the box and, according to her testimony, it was the piece of ice about the size of a silver dollar that caused her fall. The testimony of her own witness is that the iee was not on the box when the box was placed on the platform and the only fair inference from the evidence in *114its entirety is, that but a few moments at most elapsed from the time the box was placed in position until plaintiff fell. It would serve no useful purpose to speculate as to whether the-ice became detached from the shoe of some passenger who alighted just before plaintiff, or fell from the eaves of the car, or was deposited by some other, means or from some other source, the fact remains that it was not present a few seconds before the accident occurred and was not discovered by the brakeman.

Counsel for appellant insists that this case is to be determined by the» decision in Garvin v. Butte Electric Ry. Co., 54 Mont. 196, 169 Pac. 40; but the facts of the two cases ape so dissimilar that it is impossible to, deduce a rule based upon analogy. In the Garvin Case the carrier not only knew of the •presence of snow and ice upon its car-steps, but much of the snow had been deposited there by the conductor of the ear who had shoveled it out of the car vestibule a -considerable period of time before the plaintiff, Garvin, undertook to alight from the car. Under these circumstances we held that it was a proper ease for the jury to determine “whether the defendant company, through its agents, knew, or in the exercise of reasonable diligence should have known, of the danger, and had a reasonable opportunity to remove the snow and ice from the step of its-car.” In the opinion in the Garvin Case, repeated reference is made to the rule of our statute (sec. 5300, above) which imposes upon the carrier the burden of exercising, toward the passenger for hire, the utmost care. Counsel for defendants urge that the rule is not applicable to the case of a passenger alighting from ,a standing train, but that the carrier’s duty is measured'by the rule of ordinary care. It is beside the mark to discuss the subject, for, in our view of the case made, the ruling of the trial court was correct upon either theory.

Actionable negligence arises only from a breach of legal duty (Jonosky v. Northern Pac. Ry. Co., 57 Mont. 63, 187 Pac. 1014), and it follows that, to make out a prima facie case, plaintiff must have introduced evidence tending to show that *115the brakeman was negligent in failing to discover the presence of the piece of ice on the step-box in time to avoid the accident. Unless he had the opportunity to make discovery, it is altogether immaterial that the condition of the weather was such that he should have anticipated the presence of snow or ice generally.

If the trial court had denied the motion for nonsuit and the case had been submitted upon the evidence now before us with a favorable result to plaintiff, upon what evidence could the verdict be said to rest ? Could the jury say that the brakeman should have kept, his eyes upon the step-box constantly? The evidence establishes the fact that he could not do so and discharge his duties to the passengers generally and to this plaintiff in particular. Could the jury say that the ice was upon the step-box for a sufficient length of time that the brakeman, in the discharge of his duties, should have discovered and removed it ? An affirmative answer could only rest in bare speculation, for, so far as the evidence discloses, it may not have been there for more than a second or a few seconds at most.

This is not a case where the obstruction itself bore evidence of its continued presence for any appreciable length of time, and there is no room for mental process to define an interval during which reasonable prudence or the highest degree of skill and care on the part of the brakeman should or could have been at work to protect the plaintiff against the hazard created by .the momentary presence of the ice upon the box.

These observations illustrate our view of the evidence and indicate our conclusion that there is not anything in the record which tends to prove that the brakeman failed in any respect to discharge the duties which his position imposed; and since .there is no evidence which establishes negligence or from which it might be inferred, the trial court properly sustained the motion for nonsuit. Upon similar fact statements the same conclusion has been reached by other courts. (Serviss v. Ann Arbor R. Co., 169 Mich. 564, 135 N. W. 343; Bernhardt v. Western Pennsylvania R. Co., 159 Pa. St. 360, 28 Atl. 140; *116Louisville & N. R. Co. v. O’Brien, 163 Ky. 538, Ann. Cas. 1916E, 1084, 174 S. W. 31; Pittsburgh, C. C. & St. L. R. Co. v. Rose, 40 Ind. App. 240, 79 N. E. 1094; Lyons v. Boston El. Ry. Co., 204 Mass. 227, 90 N. E. 419; Proud v. Philadelphia & R. R. Co., 64 N. J. L. 702, 50 L. R. A. 468, 46 Atl 710.)

Rehearing denied March 21, 1921.

Tbe judgment and order are affirmed.

Affirmed.

Mr. Chief Justice Brantly and Associate Justices Beynolds, Cooper and Galen concur.