delivered the opinion of the court.

Action by the plaintiff for damages for personal injuries suffered by him during the course of his employment by the defendant. The accident occurred on September 20, 1909. The defendant owned and was operating a line of railway extending through the states of South Dakota, Wyoming and into and through portions of the state of Montana, and was engaged as a common carrier in interstate commerce. The plaintiff was in its employ as extra gang foreman, having under his charge a crew of laborers engaged in making repairs upon its tracks. He and the crew were required to occupy and live in outfit cars so that they could be readily moved from place to place as the exigencies of their service required. One of these cars was occupied by plaintiff and his wife. It was fitted up with a stove, bedding and other household furniture necessary to make it habitable. On the day of the accident the cars were being transferred from Dewey, South Dakota, to New Castle, Wyoming, so that the crew could effect repairs near the latter place. They were attached to the rear end of a freight train consisting of fifty-one cars. At a point about seven miles east of Dewey, while ascending a grade, the train parted, with the result that by the sudden stoppage occasioned by the automatic setting of the air-brakes, the [*408] plaintiff was thrown violently back and against a box in the rear end of the ear and thereby suffered the injuries complained of. It is alleged that the defendant was negligent in placing in the train a car equipped with a coupler which was unsafe, defective and insecure, in that the part thereof known as the lock-bloqk had become worn and loose, a fact which was known to the defendant, or, by the exercise of ordinary diligence on its part, ought to have been known to it, but was not known to the plaintiff. The complaint then alleges:

“Sixth. That on the said 20th day of September, 1909, while said train was being moved by the defendant along and upon its said track and railroad from Dewey, South Dakota, to New Castle, "Wyoming, at a rate'of speed of about twenty miles per hour, the said coupler upon said car in said train by reason of its being defective, worn and insecure, and because the defendant carelessly and. negligently failed and neglected to keep the same in good repair and in a safe and sound condition, and because of the negligent and careless operation of said train by said defendant, loosened and came apart causing the said train instantly to part, thereby breaking the air-hose of said train which controlled the brakes upon the cars. That the parting of said train and the breaking and separating of said air-hose caused the brakes upon the cars to which said outfit car was still attached, including the brakes on said outfit car, to become suddenly and violently set, thereby causing said train and cars last mentioned violently and suddenly to stop, whereby the said plaintiff was thrown with great force and violence backward a distance of about twelve feet along and in the interior of said car wherein he was then riding, against and upon a box in said car. ’ ’

The answer denies all of the allegations of the complaint, except that it admits that at the time of the accident the defendant was engaged in interstate commerce. It alleges certain matters as affirmative defenses, upon which there was issue by reply. The issues presented on this branch of the case do not require notice. At the close of plaintiff’s case, the court sustained a motion for nonsuit and directed judgment for the [*409] defendant. This appeal is from the judgment. The two questions presented for decision are, whether the exclusion of certain evidence was error, and whether the evidence was sufficient to take the case to the jury.

1. During his examination in chief, counsel for plaintiff inquired of him whether he was acquainted with the duties of a conductor on the defendant’s road. He was not permitted to answer. Counsel then offered to have him testify, in substance, that when such an accident as the one in question occurs it is the duty of a conductor to ascertain its cause, to restore the connection, if possible, and proceed with the train; to ascertain if any person has been injured, and, if so, also the nature and extent of the injury, and to make full report of the facts to his superior officers; that when the train parted, the conductor at once proceeded forward from the caboose where he then was, to ascertain the cause; that in passing the car in which plaintiff and his wife were he ascertained that plaintiff had been injured; that he then said that he was going forward to inquire the cause of the accident; that, the connection being restored, the train proceeded immediately to New Castle, arriving there thirty or forty minutes later; that the conductor then returned to the plaintiff’s car and made inquiry as to the extent of the injury in order to make his report of it, and that during the course of the inquiry, in response to a question by plaintiff as to the cause of the accident, he said that the train had parted “because of a defective coupler; a worn lock-block. ’ ’ An offer was also made to show by this witness that a similar duty to investigate and make report is required of a roadmaster; that when the train arrived at New Castle, defendant’s roadmaster came to plaintiff’s car and, after inquiry as to the nature and extent of the injury, wrote out his report; and that while so doing he stated to plaintiff that the parting of the train was caused by a “defective coupling; a worn lock-block.” This evidence was excluded on the ground that the declarations were not part of the res gestae, and were therefore incompetent.

The statute provides that where “the declaration, act or omission forms part of a transaction, which is itself the fact in dis [*410] pute, or evidence of that fact, such declaration, act or omission is evidence, as part of the transaction.” (Rev. Codes, sec. 7867.) This provision was not intended to embody the statement of a rule by which to determine the competency of such declarations as those in question, but to be a mere direction that they must be deemed competent when they are so connected with the main transaction as to form a part of it. It states one of the exceptions to the general rule recognized by all the courts in common-law jurisdictions which requires the exclusion of hearsay statements, viz.: that when declarations by the participant in or an observer of the litigated act are so nearly connected with it in point of time that they may be regarded as a spontaneous, necessary incident, explaining and characterizing it, they may be proved as a part of it without calling the person who made [1] them. The principle upon which the exception is founded is that the declarations were made while the mind of the speaker was laboring under the excitement aroused by the incident, before there was time'do reflect and fabricate, and hence the solemnity of the oath is hot necessary to give it probative value. Such statements need not be strictly contemporaneous with the main incident. They may be in the form of narrative; yet if the circumstances show they were made while the excitement produced by the incident still dominated the mind and was the producing cause, they are nevertheless part of the main incident and competent. On the contrary, if they are in fact mere narrative, they are not competent. In State v. McDaniel, 68 S. C. 304, 102 Am. St. Rep. 661, 47 S. E. 384, the court said: “If the declarations are a mere narration of a past occurrence they are not admissible as res gestae. When the declarations are not precisely concurrent with the transaction, a delicate and complex question is presented to the trial judge in determining their admissibility, and each case must be decided upon its own circumstances. In the nature of the ease, there can be no hard-and-fast rule as to the precise time near an occurrence within which declarations explanatory thereof must be made in order to be admissible. The general rule is that the declarations must be substantially contemporaneous with the litigated transaction and [*411] be tbe instinctive, spontaneous utterances of tbe mind while under the active, immediate influence of the transaction, the circumstances precluding the idea that the utterances are the result of reflection or design to make false or self-serving declarations. * * * Questions of this kind must be very largely left to the sound judicial discretion of the trial judge, who is compelled to view all the circumstances in reaching his conclusion, and this court will not reverse his ruling, unless it clearly appears from undisputed circumstances in evidence that the testimony ought to have been admitted or rejected, as the case may be.” The tendency of recent decisions is to relax the rule of admissibility rather than to restrict it, and to consider the weight to which the evidence is entitled. (Jack v. Mutual Reserve Fund Assn., 113 Fed. 49, 51 C. C. A. 36, and cases cited.) Accordingly, this court in State v. Tighe, 27 Mont. 327, 71 Pac. 3, held that, as in ease of confessions, it is the province of the trial judge to determine in limine the admissibility of declarations and leave the question of their weight to the jury, in view of the circumstances under which they were made. This must necessarily be the case whenever a question of fact arises upon conflicting evidence as to whether they are part of the res gestae, or depends upon contradictory inferences either of which may fairly be drawn from [2] uncontradicted evidence; and since this is so, the solution of the question of the admissibility of such evidence must in every case be left largely to the sound legal discretion of the trial court, subject to review only in eases of manifest abuse. (3 Wigmore on Evidence, sec. 1750; State v. McDaniel, supra; Walters v. Spokane International R. Co., 58 Wash. 293, 108 Pac. 593.)

Even under this liberal rule, however, we do not think the [3] declarations admissible on the theory that they were prompted by the excitement produced by the accident itself. The conductor did not return to plaintiff’s car until the train had reached New Castle, some half hour or more after the accident. Apparently, he would not have spoken on the subject at all if he had not been questioned by the plaintiff. His statement assumed the form of narrative, rather than that of a spontaneous [*412] utterance as a necessary incident of the accident itself explaining and characterizing it. The roadmaster did not witness the accident but learned of it after the train had reached New Castle. ITis statement, therefore, could not have been due to any excitement aroused by his witnessing the accident or his presence when it occurred. But we think the evidence competent upon another theory, vis., as admissions by the agents of the defendant within the scope of their employment while engaged in the discharge of their duties. Whether it was in fact among the duties of these employees to ascertain the cause of the accident and the nature and extent of any injury caused by it and malte report to their superior officers, we need not stop to inquire. The plaintiff offered to show that this was so. If such was the ease, the statements were made while these employees were in the discharge of their duties. Now, it is a well-settled rule that when an agent is vested with authority to perform any act for his principal, his words — his verbal acts — while engaged in that business, are a part of the res gesiae of that business. They are therefore the words and acts of the principal and may be proved against him. (Hogan v. Kelly, 29 Mont. 485, 75 Pac. 81; Hupfer v. National Distilling Co., 119 Wis. 417, 96 N. W. 809; Hyvonen v. Hector Iron Co., 103 Minn. 331, 123 Am. St. Rep. 332, 115 N. W. 167; Turner v. Turner, 123 Ga. 5, 107 Am. St. Rep. 76, 50 S. E. 969; Lynchburg Tel. Co. v. Booker, 103 Va. 594, 50 S. E. 148; Baker v. Westmoreland etc. Gas Co., 157 Pa. 593, 27 Atl. 789; Anderson v. Great Northern Ry. Co., 15 Idaho, 513, 99 Pac. 91; Leach v. Oregon S. L. R. Co., 29 Utah, 265, 110 Am. St. Rep. 708, 81 Pac. 90; Redmon v. Metropolitan St. Ry. Co., 185 Mo. 1, 105 Am. St. Rep. 558, 84 S. W. 26; McNicholas v. New England T. & T. Co., 196 Mass. 138, 81 N. E. 889.) For the time being the agent is the alter ego of the principal, and while he is not employed to talk about the business of his principal or to admit away the rights of- the latter, declarations and admissions by him touching the business in hand dum fervet opus, are those of the principal. “This rule is especially applicable to corporations, which can speak and act only through agents. Justice to the rights of others requires [*413] that acts of such intangible entities must be significant, and the basis for conduct by others as in the case of individuals. When, therefore, a corporation selects an individual to do an act in its behalf, the individual, in doing that act, i. e., within the scope of his authority, is, in legal effect, the corporation.” (Hupfer v. National Distilling Co., supra.) If, however, the appointed work has been completed, any statement made by the agent with reference to it is, under all the authorities (2 Chamberlayne’s Law of Evidence, sec. 1346), a mere narrative of a past transaction and is not admissible under the res gestae rule. It is, as to the principal, mere hearsay.

Counsel for defendant cite and rely on the cases of Ryan v. Gilmer, 2 Mont. 517, 25 Am. Rep. 744, and Poindexter & Orr L. S. Co. v. Oregon Short L. R. Co., 33 Mont. 338, 83 Pac. 886. In the latter of these cases the person whose declaration was held incompetent was not the agent of the corporation to do the act with reference to which the declaration in question was made. With reference to the former, it may be noted that the admission held incompetent was made by the driver of a vehicle immediately after it had been overturned, the accident resulting in injury to a passenger, and while the driver was still in charge of it. Under the more liberal rule observed by many of the courts, the evidence was competent. The case serves only to illustrate the difficulty the courts have experienced in ascertaining and declaring any definite rule by which tó determine whether the admission under consideration was or was not made while the agent was acting within the scope of his authority. It is not in point, because, as we have shown, the declarations in question here were made while the conductor and roadmaster were in the actual discharge of the duties delegated to them. The exclusion of the evidence was error.

2. Counsel contend that inasmuch as the parting of a train is not an ordinary occurrence in the operation of railroads, the fact that such an accident occurred in this instance, there being no explanation of the cause of it, was sufficient to raise a presumption of negligence by the defendant or some of its servants, and therefore that a ease was made for the jury without regard [*414] to the excluded evidence. They insist upon two propositions, either of which, if accepted as sound, they say, will require a reversal of the judgment in this case, vis.: (1) That plaintiff for the time being occupied the position of a passenger; hence the presumption of negligence arising from the happening of the accident made out a prima facie case; (2) that the reason for indulging this presumption in favor of a passenger and not in favor of a servant is that an accident may be due as well to the negligence of a fellow-servant as to the lapse of duty by the carrier with reference to some nondelegable duty; that this action was brought under the federal Employers’ Liability Act (25 Stats. at Large, 65, 1909 Supp. Fed. Stat. Ann., p. 584), which cuts off the defense of negligence by a fellow-servant; and that, since this is so, logically, the same presumption must be indulged in favor of the servant as in favor of the passenger. We shall not undertake to determine at this time whether these contentions are maintainable. We think both of them involve questions which are at least debatable. Upon the presumption that the plaintiff proved his ease according to his offer, however, we think he was entitled to go to the jury without regard to the theory advanced by counsel in either of these contentions.

For present purposes we shall assume that it is settled law that in an action by a servant against his employer for an injury caused by the negligence of the latter, proof of the accident alone does not furnish a basis for an inference of culpable [4] negligence, but that the servant must go further and show by direct proof, or by circumstances, that his injury sprang wholly or partly from some omission of duty by his employer. If he fails to do this he has failed to make a case for the jury. If, however, in proving the injury, the facts and circumstances disclosed tend to show that the instrumentality which caused the injury was exclusively in the control of the employer and the injury occurred by reason of some defect therein, the existence of which is attributable to a negligent omission of duty by the employer rather than to any other cause, he has made a case justifying a presumption of culpable negligence. The burden then devolves upon the employer to rebut the presumption, by [*415] explaining the circumstances so as to render their existence consistent with the exercise of due care. The general rule applicable to this class of cases, viz.: that the plaintiff must prove negligence, is qualified by way of exception by what is termed the doctrine of res ipsa loquitur, which means merely that the circumstances under which the accident occurred charge the defendant with culpable negligence. In Hardesty v. Largey Lumber Co., 34 Mont. 151, 86 Pac. 29, the rule is stated thus: “Of course, the general rule of law is that negligence is not inferable from the mere occurrence of the accident; but to this rule is the well-understood exception that, where the thing which causes the injury is shown to be under the management and control of the defendant, and the accident is such as in the ordinary course of things does not happen if those who have such management and control use proper care, it affords reasonable evidence, in the absence of explanation by the defendant, that the accident arose from the want of ordinary care by the defendant. (1 Shearman & Redfield on Negligence, sec. 59.) Under such circumstances proof of the happening of the event raises a presumption of the defendant’s negligence, and casts upon the defendant the burden of showing that ordinary care was exercised. This rule has been invoked in numerous similar cases.” The train upon [5] which plaintiff ivas riding was under the control and management of the defendant. The defendant knew, or ought to have known, by whom it was made up, how it was made up, how it was equipped and what degree of care had been exercised in making it safe to run. The duty to see that it was properly equipped was a primary, nondelegable duty of defendant. It separated because of a “defective coupler or worn lock-block.” Ordinarily, when a train is equipped with couplers which are sound and suitable for use, it does not part. Therefore, the fact that one of those in use at the time of the accident was defective and worn to such an extent as to permit the train to part, points to neglect by defendant to perform a primary duty rather than to any other cause, and properly calls for explanation. In the absence of such explanation the jury would be justified in holding it responsible for the accident and the [*416] injury resulting from it. (Griffin v. Boston & Albany R. Co., 148 Mass. 143, 12 Am. St. Rep. 526, 1 L. R. A. 698, 19 N. E. 166, and cases cited.)

The judgment is reversed and the cause remanded for a new trial.

Reversed and remanded.