delivered the opinion of the court:
The appellant, Capital Traction Company, defendant below, complains of a judgment rendered against it in an action bottomed on negligence resulting in an injury , to the appellee, Henry F. Copland, one of its passengers, while he was riding-on one of appellant’s cars along- Calvert street, near the westerly end of the Rock creek bridge in this city. During a conversation with a fellow passenger, the plaintiff inadvertently made a gesture which carried his hand through the bars of an open window at his elbow and into contact with the collar of a pole standing near the track. The collar was 8 or 8% inches from the car. He averred that under the circumstances the defendant was negligent in maintaining the pole so near to its passing cars without taking proper precautions to protect passengers against injury from it; while, on the other hand, the street car company claimed that it was not negligent and that plaintiff was guilty of contributory negligence.
The first point raised by the appellant is that the court erred in admitting over its objection certain testimony with respect to prior accidents. These accidents resulted from the hands or arms of passengers coming into contact with poles located similarly to the one which injured plaintiff. This testimony was received for the sole purpose of bringing home to the company notice that there were poles so near its passing cars as to endanger the safety of passengers. The polo that caused one of the accidents was next to the one which injured plaintiff, while the pole producing the other accident was about three blocks away. In each case the pole stood about (the same distance from the cars. Appellant had knowledge of these accidents, suit having been brought against it by one of the injured parties. We think the evidence was competent. The supreme court of Minnesota said of testimony like this: “It was, of course, not com-*157potent for tlie purpose of showing independent acts of negligence', but on principle it is cloarlv admissible when it tends to show that the common cause of these accidents is a dangerous or unsafe thing * 'x'. Upon any issue as to- the condition or safety of any work of human construction designed for practical use, evidencie showing how it has served when put to the use for which it was designed would seem to boar directly upon the issue.” (Morse v. Minneapolis & St. L. R. Co. 30 Minn. 471, 16 N. W. 358.) Wharton in his work on Evidence, vol. 1, secs. 40, 41, declares: “Eut when a party is charged with the negligent use of a sx>ecifie agent and when the case against him is that he did not use care proportionate to the danger, then the question becomes material whether he knew or ought to have known of the extent of the danger. On such an issue as this it is relevant for the party aggrieved to put in evidence all disconnected acts of which it was the duty of the defendant to have been cognizant, and which, if he were cognizant of them, would have advised him of the extent of the danger, and would have made it his duty to take precautions which would, if faithfully applied, have prevented the injury sued for.” In Chicago G. W. R. Co. v. McDonough, 88 C. C. A. 517, 161 Fed. 667, which arose out of an explosion in June, 1904, evidence was received of three prior similar explosions, one in 1900, another in 1901, and another in 1903. With respect to this testimony, Judge Van Devanter, now of the Supreme (hurt of the United States, who spoke for tlie court, observed: “It was admitted as tending to show some notice to the defendant of the probable length of time that the tubes or hues could be used with reasonable safety, in the conditions surrounding their use in that boiler, and as bearing upon the precaution which in the exercise of reasonable or ordinary care should have been taken thereafter * x xy (See also District of Columbia, v. Armes, 107 U. S. 519, 524, 27 L. ed. 618-620, 2 Sup. Ct. Rep. 840; Chicago & N. W. R. Co. v. Netolicky, 14 C. C. A. 615, 32 U. S. App. 168, 406, 67 Fed. 665; Hoyt v. New York, L. E. & W. R. Co. 118 N. Y. 339-405, 23 N. E. 565; Kent v. Lincoln, 32 Vt. 591—597.) Under the doctrine of these cases the testimony with respect to the prior accidents was properly admitted.
*158Nor is there anything in the cases cited by the appellant, when correctly understood, which conflicts with the doctrine of the foregoing authorities. Some of them say that evidence of prior accidents for the purpose of establishing negligence is not proper, because the conduct of the parties concerned in them may be quite different from that of those in the instant suit. And whether the defendant was guilty of negligence in the prim-eases would require a trial, thus raising "a collateral issue',, which of course could not be allowed. (Collins v. Dorchester, 6 Cush. 396; Crocker v. McGregor, 76 Me. 282, 49 Am. Rep. 611; Diamond Rubber Co. v. Harryman, 41 Colo. 415, 15 L.R.A.(N.S.) 775, 92 Pac. 922.) Other cases are to the effect that the evidence was not admissible because it ivas not the best evidence of the thing sought to be proved. Aldridge v. Pelham, 1 Gray, 510, illustrates these. In that case it was held that where the issue was as to whether a road was too narrow to permit two Avagons to pass each other at the place of the accident, evidence that two Avagons had done so Avas not the best evidence, the width of the road being ascertainable with certainty by actual measurement. Manifestly cases of this character do not bear upon the question avc are considering.
Appellant contends that, since the declaration in one of the prior accident cases Avas admitted as evidence in the present case, it should have been allowed to introdrice the entire record in that case, since, as appellant argues, it Avould show' that the jury in the former case had returned a verdict for the defendant, and hence that appellant Avas not negligent in that cast;; but, as avc have said, the declaration Avas not received for the purpose of establishing negligence, but for the sole purpose of showing notice. The complete record Avas therefore immaterial.
The next question- presented for our consideration is as to Avhethcr or not plaintiff established a cause of action. Appellant says it did not, and predicates its contention upon the theory that the evidence showed without dispute that the plaintiff Avas guilty of contributory negligence. It is said that the AvindoAv through Avhicli plaintiff pushed his hand against the polo Avas guarded by iron bars 3 inches apart, and that his hand must have passed between them; that these bars Avarned passengers *159to keep ill] portions of their bodies within the ear; that plaintiff was bound to take notice of the warning; and, having failed to heed it, was guilty of contributory negligence as a matter of law. Air. Hanna, Vice President, in charge of operations of the appellant company, testified that the bars were not placed “with the idea of preventing the possibility of a hand being put through them;” that a “wire net. would warn and stop your hand” while1 “the liars would warn and let your hand go through.” “They were1 put there,” he said, “so that it would not be possible for a hand to go through the window without a warning being given to the passenger.” “That,” he adds, “was the theory upon which those bars were placed there.” If this be correct, the warning might not become effective until the hand was on its way between the bars, and then, it might well be said, it would be too late to prevent accident. Hence, whether or not the. bars gave warning; and if they did, was it sufficient, presented questions of fart about which reasonable men might differ; and, this being so, it was for the jury, and not for the. court, to decide. (Mosheuvel v. District of Columbia, 391 H. S. 247, 48 L. ed. 170, 24 Sup. Ct. Rep. 57, 15 Am. Neg. Rep. 246.j Common carriers of passengers, like the defendant, are bound to exercise extraordinary vigilance addl'd by the highest skill .for the purpose of protecting their passengers against injury resulting from defects in ways or instrumentalities used by the carriers. (Pennsylvania Co. v. Roy, 102 U. S. 451, 26 L. ed. 141, 10 Am. Neg. Cas. 593.) They are bound to anticipate what passengers would naturally do under circumstances such as those in which the plaintiff acted. Alen will gesticulate and point out an ojien window as they talk and ride along. This is not unusual, and whether or not the railroad company should have anticipated it and provided against it was a question for the triers of fact.
There is nothing in Chapman v. Capital Traction Co. 37 App. D. C. 479-490, which conflicts with tiffs. In fact that case is quite in harmony with wlrnt vre have said. Tlic accident happened under circumstances in many respects like those in the present case. The plaintiff, a passenger, projected her hand through window bars having the same space between them as *160those in this case. It was urged that the bars constituted a warning; and the court, at the request of .the street railway company, charged the jury that it was for them to say whether the plaintiff’s disregard of the warning was sufficient to charge her with contributory negligence. But it is said that the instruction in that case, afterwards approved by this court, contained this language: “The presence of the said bars in the said place was a warning to the plaintiff that it was dangerous for her to project any part of her body beyond the said bars,” and that that is authority for the argument now made that the jury should have been told as a matter of law that plaintiff’s disregard of the warning constituted contributory negligence and defeated his right to recover. In the first place it should be noticed that the excerpt quoted does not say that her disregard of the warning was negligence, but merely that the presence of the bars advised her that it was dangerous to project her body beyond them. In commenting upon this Mr. Chief Justice Shepard said: “While it would seem that window rods of the hind in this case would ordinarily serve no other good purpose than that of preventing the extrusion of the head or body of a passenger, and therefore contain a notice or warning of probable danger in the extension of an arm or hand through the openings between or above the same, yet whether this be the fact is, in our opinion, a question for the determination of the jury, and not the court, in finding whether there was negligence on the part of either carrier or passenger.” Referring directly to the instruction and answering the attach made upon it, he said: “The general purpose of the instruction was to submit the question of contributory negligence to the jury, and the test given was whether ordinarily prudent persons, under similar circumstances, would have done Avhat she did.” Under this authority, in which we fully concur, the court below was right in refusing to charge as matter of law that the plaintiff was guilty of contributory negligence in the respect claimed.
Much reliance is placed by the appellant upon the case of Christensen v. Metropolitan Street R. Co. 70 C. C. A. 657, 137 Fed. 708, 18 Am. Neg. Rep. 690, but the facts therein arc quite different from those in this case. There a screen with meshes *161about Y\ of an inch square, and covering the window from the sills upwards for a distance of 14 to 16 inches, was fastened securely to the outside of the window. Above the screen was an opening something like 14 indies. Passengers sat with their backs to the windows. The injured person, in order that she might put her head outside, had to arise from her seat, turn about, and either stand or kneel on the seat. It was held “that the company was not required to anticipate that plaintiff might become ill and attempt to put her head out of the window, when it would be impossible for her to do so without turning about and either kneeling or standing on the scat.” .A rule of law apposite to those facts could not properly be applied to the facts in the case before us.
Testimony with respect to the swaying of the cars was admitted over the objection of the appellant; and it is claimed that this was improper because, as it is asserted, the testimony had no tendency to prove the negligence claimed by the declaration. We think the swaying was one of the circumstances proper to be considered by the jury in determining whether or not the company was negligent in maintaining the poles so near the car, with no protection for passengers other than that which was afforded by the bars across the window.
Appellant asked the court to charge the jury that the poles, one of which caused the accident, were placed with the approval of the Commissioners of the District of Columbia, and that, since they were, no negligence could be attributed to the defendant, and lienee that a verdict should be returned against the plaintiff. This ignores entirely the question as to what care the defendant took to protect its passengers from injury by reason of the juxtaposition of the poles to the ears, and was properly refused.
No instruction was given by the court relative to the burden of proof either as to negligence or contributory negligence. This, however, was not error unless the appellant made a request correct in point of law and applicable to the facts. (Catts v. Phalen, 2 How. 376, 11 L. ed. 306; Haffin v. Mason, 15 Wall. 674, 21 L. ed. 198.) The request presented upon the subject by the appellant, if given, would have told the jury *162before it could return a verdict for tbe plaintiff, it. must find that the trolley pole with which plaintiff’s hand came in contact “unnecessarily and negligently imperiled the safety of passengers * * This is not the law. The jury was not required to find, in addition to negligence, that, ylef end ant. had unnecessarily imperiled the safety of plaintiff. If it can be correctly said that technically the one indudes the, other, then the request was confusing by making it appear, as it did, that there were two elements instead of one to be determined, and for that reason it was improper. (Louisville & N. R. Co. v. Hall, 87 Ala. 708, 4 L.R.A. 710, 13 Am. St. Rep. 84, 6 So. 277; Chabert v. Russel, 109 Mich. 571, 67 N. W. 902.) The reqrrest should not have been given as it was presented, and it was no part of the court’s duty to remodel it. (2 How. 376, supra.) In this connection wc may remark that the failure of the court to charge with respect to the burden of proof was undoubtedly an oversight, and would have been promptly cor-, rected if appellant had specifically directed the judge’s attention to it at the close of his charge.
It is also claimed that the court erred in failing to tell the jury at the request of the defendant “that no presumption of negligence on the part of the defendant arises in the ease at bar from the mere happening of the accident in question.” We think the equivalent of this instruction was given by the court when it charged the jury that whether or not there was negligence on the part of the defendant was “a question of fact for you. It is for you, in your good judgment, to decide whether it was negligence on the part of the company to maintain the pole in that position with respect to the passing car. Of course you cannot divorce that question from the other question, — the warning. It is really one question.” In other words that the jury must not presume, but must determine from the evidence, that defendant was negligent. Anyhow there could be no error in refusing to give the request as framed, because it was a part' of the request concerning the burden of proof which we have just seen embodied an improper statement of the law, and hence could not be given.
Defendant requested an instruction identical with one given *163in tlic Chapman Cane, supra, bearing upon the question as to whether or not the window bars constituted a warning to the plaintiff, and appellant now asserts that the court erred in refusing it. The instruction in the Chapman Case, as interpreted by this court, asked the jury to say whether or not the presence of the bars on the window was a warning to plaintiff. The court, referring to it, observed: “Assuming that a direct instruction to the jury, that the existence of the bars was necessarily notice and warning to plaintiff, would be error, we do not find that the words quoted took the question of fact from the jury.” In the present case the court submitted the same question to the jury in this language: “And then it is said that the bars served as a warning. Whether they did is a question of .fact for you, and whether they were a sufficient warning is a question of fact for you.” The subject, therefore, was properly covered by the court in its own instruction, and there was no vice in the refusal to give the request made by the defendant.
Finally it is urged on behalf of appellant that the court’s charge gave the jury to understand that the plaintiff would not be chargeable with negligence unless he knowingly and intentionally protruded his hand beyond the bars, and that this was error. We do not so understand the charge. After stating that the plaintiff testified that “he had almost involuntarily” thrown his hands outward, and also that the conductor had testified that the plaintiff had told him that “he had put his hand out of the window to call the attention of his companion to some work he had previously done in that vicinity,” the court said: “Whíchevex way you find tlie fact to be, then you will have to consider the question of whether what he did was the act of a reasonably careful and prudent man in the circumstances.” There was no error in this respect.
The charge of the court is clear, well arranged, and untainted with error. Upon a careful review of the whole record we are satisfied that the judgment is in harmony with law, and it is therefore affirmed, with costs. Affirmed.