delivered the opinion of the court:
This action was brought under the employer’s liability act of 1901. Plaintiff recovered $3,500.00 for the death of her husband, claimed to have been caused by the negligence of his co-employees. Our work is considerably simplified by the circumstance that, negligence and contributory negligence, which subjects constitute the essence of this controversy, are in this, as in all similar cases, matters peculiarly within the province of the jury.
The complaint is not above criticism; but it was not challenged by demurrer, and plaintiff’s case, as stated therein, rests upon the contention that Evans and Ballou negligently conducted the work of tram-*241n-nnp’ waste in which, they were engaged; and that by reason of snch negligence, the accident resulting in the death of Johnson occurred.
A good deal of evidence was received upon this issue of negligence, and in some respects it was quite conflicting. The conditions were such, however, as to require the submission of the question to the jury. The court, by proper instructions drawn and presented in part by defendants, carefully charged the jury to weigh- the evidence and determine the issue. And while plaintiff’s proofs are not so full or satisfactory as they might be, yet under the well-known rule applied in courts of review, we must accept the decision of that body in the premises ; the record does not present such a condition as would justify us in setting aside the verdict on this account.
Appellants, who were defendants below, did not admit that Evans and Ballou were negligent or that any negligence on their part produced the accident. But they insist that if such negligence did exist, defendants were not legally responsible therefor.'
The' strongest assault on the judgment before us is based upon the proposition that Evans and Hoover were not acting within the scope of their employment at the time of the accident. ■ Defendants invoke the principle that, even under statutes like ours, where an employee is injured through the negligence of his co-employee, the’ employer cannot be held responsible for the injury unless. the negligent co-employee was at the time discharging the specific duties for which he was employed.
It is insisted that Evans, being a drill or machine man, and Hoover, being his helper, were not required to take the place of trammers or muckers; that when, on the day of the accident, they voluntarily undertook to assist Johnson and Ballou, the *242regular trammers, they stepped entirely outside the scope of their employment; and that even if they were guilty of negligence and such negligence resulted in the death of Johnson, defendants cannot be held responsible therefor.
The answer to this argument is twofold: In the first place, plaintiff, to meet the issue thus raised, undertook to prove the existence of a usage or custom pursuant to which the machine men so often performed the work of'tramming, that such work was brought practically within the scope of their employment, or at least defendants were estopped thereby from the assertion of this particular defense. It appeared that frequently during a period of two or three years preceding the accident, the machine men, having completed their work at one point before the trammers had removed the waste at another point where the drills were to be next used, aided in mucking ; there is testimony that the foremen in charge of the work were sometimes present when this was being doné; but there is nothing to show that either of defendants gave orders to this effect, or that their leading officials were aware of the" practice. Of course, however, knowledge by the foreman, or other direct representative of defendants in charge on the ground, would be the knowledge of defendants themselves. ' And the existence of such usage and knowledge thereof by defendants were submitted under proper instructions to the jury and were determined by that body.
An affirmative finding of the jury in this regard would be supported somewhat by the following circumstance: These machine men were regular employees of defendants; their employment was closely allied in one respect to the work of tramming; it was clearly their duty to muck “back” — that is, if waste remained at the breast of the drift or crosscut when *243they were ready to place the drill therein, it was their dnty to move or shovel such waste hack far enough to secure an open and level space for the machine. It was ordinarily not their duty, however, to muck “out” — that is, to shovel waste into the car and then perform the work of tramming the same. But hy assisting the muckers in mucking out when they were behind, the machine men would sooner be able to resume their regular work, and the interest of their common employer would be promoted.
A marked difference exists in this respect between pure volunteers, i. e., volunteering strangers, and volunteering employees. A custom or usage will more readily be implied in the latter than in the former case. And under the circumstances here presented, an affirmative finding upon this proposition by the jury would not be at all unreasonable.
But there is another reply to the present argument of defendants. It will be remembered that Evans, the chief machine man, and Ballou, one of the trammers, were working together in tramming out waste at the time of the accident; while Hoover, the assistant machine man, and Johnson, the other trammer, were together in performing the same kind of work. The negligence is charged against Evans and Ballou; that is, against one of the machine men and one of the trammers. So that one of the persons charged with this negligence was unquestionably acting within the scope of his employment.
Neither the complaint nor the evidence separates Evans and Ballou as to the negligence; they are charged jointly, and the evidence deals with them jointly; no act of negligence is claimed or shown against one that is not claimed and shown against the other; the different acts constituting the alleged negligence all appear to have been jointly performed.
*244As already observed, the claim that the negligent employees were at the time of the accident acting outside the scope of their employment was an affirmative defense pleaded and relied on by defendants. And of course the burden devolved upon them to sustain the same. And in discharging this burden they were requiredoto show that the employee whose negligence caused the injury was acting outside the purview of his employment.
When, therefore, plaintiff proved that Evans and Ballou were both at the time of the accident working together in the employ of defendants, and that such accident resulted through their negligence while doing the work of co-employees of Johnson, she had done sufficient in this regard. To render applicable the rule invoked by defendants, it was for them first, to demonstrate that Evans was acting outside the scope of his employment, and then to distinguish between Evans and Ballou and show that the negligence was that of Evans, and that Ballou did not materially participate therein.
In view of the foregoing considerations we must conclude that Evans and Ballou were guilty of negligence,' and that such negligence produced the accident. We must further conclude that defendants failed to sustain the defense based upon a departure by the negligent employees from the scope of their employment.-
In this connection defendants’ objection to certain evidence offered by plaintiff, and admitted, may properly be considered.
Hoover, Trotter and Bice testified to the fact that machine men sometimes assisted the muckers in mucking out waste. Counsel insist that this testimony should have been rejected. It was offered and received for the purpose of establishing the custom or usage already adverted to. The excuse for its *245introduction was the defense just disposed of, viz.: that Evans and Hoover were, at the time of the accident, not working within the scope of their regular employment.
The latter contention might have been true, and yet plaintiff’s recovery be allowed to stand, even had Evans and Hoover been then working together in handling the loaded car of waste. Although these men were .employed to do the work of drilling and shooting, yet if they and their predecessors had for a considerable period pursued the practice of helping the muckers when the latter were behind, the scope of their employment might thereby he enlarged, or, as already observed, defendants might be precluded from relying upon the foregoing defense. The existence of such a practice with sufficient publicity and uniformity to establish a usage or custom, would have that effect; provided defendants knew, or under the circumstances should have known, the conduct of their employees in that regard. Defendants could not permit such a custom to prevail, accepting the benefits thereof, and yet avail themselves of this defense.
Hence it is that defendants’ counsel base their challenge of this evidence mainly upon the ground that knowledge of such usage or custom, if the usage existed, was not brought home to. their clients..
But defendants are corporations, and of course the knowledge of their representatives in charge is knowledge of the corporations themselves. The practice in question is shown to have existed to a greater or less extent in both the single and double tracked portions of the property for several years. The presence of foremen Harrison and Thomas, when machine men were thus helping muckers, is shown by the testimony of Evans, Ballou, Trotter and Rice, And Willis, the superintendent, testified that, when *246a foreman, lie saw this done in the Niwot crosscut. These foremen appear to have been in entire charge of the mining operations during a large part of the time; they directed the work and sometimes hired and discharged the men. It is incredible that this usage or practice could have been' unknown to them. And, as above suggested, their information was that of defendants. The jury may have concluded that defendants possessed the requisite knowledge; or they may have determined that if defendants were not aware of the practice, knowledge by them must, under the circumstances, be presumed.
This brings us to the defense of contributory negligence. Supporting this defense, counsel for defendants first invoke the rule touching a choice of methods by employees. That is, where an employee voluntarily selects a dangerous way of performing his duty instead of choosing a safe method, both being equally open to him, he assumes all the risk arising through the method chosen.
The assumption of such risk by Johnson, the deceased, in this case arose, as counsel contend, in the following manner: Had the tramming been done by the “round trip” method, i. e., with but one car moving at a time, the accident obviously could not have happened; by accepting the assistance of the machine men, Johnson and Ballou introduced the moving of two cars at the same time — a loaded car out and an empty one in — while by rejecting the assistance of Evans and Hoover, they would have been absolutely safe. Thus they voluntarily chose a dangerous method; a method that subjected them to the risk of just such accidents as the one that happened.
This argument presupposes that the two trammers working alone would move but one car at a time. But there is no affirmative evidence to this *247effect. And as contributory negligence is a defense, it devolved upon defendants to make the requisite proofs. In order to sustain this defense they ought to have shown that Johnson and Ballou, when working alone, did not start a loaded car out until the previous round trip was completed by return of an empty car. It may have been the practice for each of the two muckers to operate a separate car and to alternate precisely as was being done at the time of the accident. In so far as the proofs bear upon this subject, they tend slightly to show that, for a portion of the time at least, such a practice prevailed when there were but two trammers.
There might have been advantages in thus operating whether two or four men were engaged in mucking. And the code of signals, hereinafter more fully considered, points somewhat to such method by the two muckers alone. That code was adopted and in general use; the employees were all familiar with it; no special mention of it occurred on the day of the accident; its existence and applicability were assumed as a matter of course by all parties at the trial — witnesses, defendants and counsel. But this code was only necessary when cars were being moved in opposite directions on a single track. If the machine men only at rare interváls assisted the muckers, and if the muckers when working alone moved only one car at a time, it is strange that this code of signals was so universally known, and so instinctively acted upon.
But the trial court in four carefully worded instructions, two of which were asked by defendants, fairly submitted this subject to the jury. The printed argument in reply, briefly criticises instructions numbered four and five, prepared by plaintiffs; but taken in connection with the rest of the charge, we do not think the alleged imperfections were seri*248oils or could have tended in the least to mislead the jury.
Again, it is earnestly contended that Johnson was guilty of contributory negligence in disregarding, or partially disregarding, the code of signals above mentioned. The East Columbia drift and the north crosscut therefrom contained a single track only; while the Niwot crosscut, with which this drift connected, and other portions of the mine, were double tracked. The loaded cars were, as we have seen, trammed by the muckers to the Niwot crosscut, and at a distance of 700 or 800 feet from the starting-point were placed upon a switch or side track to be taken out with horses; but the mucker or muckers in each instance always brought back from another switch neafby, an empty car.
In order to regulate this part of the work, and to avoid delays as well as accidents, a custom of signaling was adopted by the employees. As to this custom or usage, there is no dispute. When cars were being moved alternately, before starting out with the, loaded car or beginning the return trip with an empty car, each party was required to strike with a stone or metallic substance upon the iron air pipe above described, and the one first signaling secured the right of way. That is to say, when the muekej or muckers at the breast of the drift or crosscut loaded a car and were ready to start out, he or they gave a signal upon the iron pipe, and the other party then remained in the Niwot crosscut until the loaded car came out. If, on the contrary, the signal was first given by the mucker or muckers ready to start in with the empty car, then the others held the loaded car until the empty had been returned. But a prompt answering- signal in either case showed that the responding party wanted the right of way, and the' signaling party then refrained from starting. So *249that the party first signaling was entitled to the track, unless a counter-signal was given, in which event the other party had the right of way.
It appears that on the day of the accident when Johnson and Hoover completed the run and placed the loaded car upon the Niwot switch, they left that point and went some 200 or 300 feet down the latter crosscut to a sanitary box and were gone from five to ten minutes; Hoover says “about five minutes.” When they. returned, and before starting in with the empty ear, they signaled upon the air pipe. Evans and Ballou, according to the evidence, also signaled twice upon the air pipe before starting out with the loaded car, allowing several minutes between signals; but neither party heard the other’s signal; although Evans and Ballou were expecting the return of Johnson and Hoover, and hence must have been expecting their signal. ' It 'is contended that Johnson and Hoover were guilty of contributory negligence in passing down the tunnel to the sanitary box where they would be less apt to hear the signal of Evans and Ballou; and that otherwise they did not exercise sufficient caution in the giving and receiving of signals.
The evidence shows that the air pipe extended to and beyond the point where the sanitary box was constructed; that from the pipe to the box was only about ten feet; and that the signal sound was carried distinctly for more than 3,000 feet, or three times the distance back to the breast of the Columbia crosscut. So this act of Johnson and Hoover did not appreciably lessen their ability to hear the signal.
Besides, Johnson and Hoover must have begun their return with the empty car before Evans and Ballou started out with the loaded car. This fact appears from the following, viz.: The distance traveled by them with the empty car in the Columbia *250drift before the accident occurred, coupled with the fact that the speed of the loaded car was ordinarily several times as great as the speed attained by the returning empty car, and with the further fact that Before the collision Evans and Ballou had traveled out with the loaded car less than twice the distance covered by Johnson and Hoover returning with the empty car.
Hence for this reason, also, it cannot be said that the conduct of Johnson and Hoover in going to the sanitary box and remaining there five or ten minutes was the cause of the accident, or could have contributed thereto.
It is strange that neither party heard the other’s signal. The jury may have concluded that the noise of their moving empty car prevented Johnson and Hoover from hearing the second signal of Evans and Ballou; although, according to the testimony, such noise, even though coupled with conversation, ougfit not to have had this effect. And it is strange that Johnson and Hoover did not hear the first signal given by the other parties.
But it is not necessary for us to speculate further upon this subject. The court carefully submitted the same to the jury. He covered every conceivable phase of the matter in instructions numbered 9, 11, 14 and 17. The latter three of these instructions were prepared and prayed by defendant’s counsel, and presented the subject from their chosen standpoint.
Portions of the charge are criticised and the refusal of certain requests is assigned for error. The matters thus complained of are largely covered by the foregoing discussion. We have incidentally-noticed with approval several instructions given the jury. Certain subjects might have been more clearly and satisfactorily presented to that body. But the *251charge, as a whole, is fair, and we do not see how the jurors could have been misled; they were exhaustively enlightened from the standpoint of both parties in some twenty-two instructions. Twelve of these instructions were the work of counsel for appellants, and upon careful consideration we feel that in this, as well as in other respects, appellants’ interests were protected. If they have suffered any wrong or injustice it was through imperfection of judgment on the part of the jury. But there is nothing to show that that body was governed by malice or prejudice or by other improper motive,- and no sufficient ground appears for interference by us.
The judgment of the court below must be affirmed. Affirmed.
Chief Justice Steele and Mr. Justice Maxwell concur.