The plaintiff, at the time of his injury, September, 1911, was fifteen years old. He had attended the public schools in Lawrence, including the grammar school, until he was fourteen years of age. From four to six days previous to the accident he was employed by the defendant in the work of pushing a bobbin truck from the weave room on the third floor to the elevator on that floor, thence to the spool room on the sixth floor. The truck was about eight feet long and between three and four feet wide. The elevator was ten feet in width and eleven feet, ten and one half inches in length. As the elevator went up and down, it automatically worked a gate on each floor of the building-on both sides of the elevator, designed to prevent people from falling into the well. The gate fitted into a “recess” or “overhang” back on the face of the wall, about four inches wide and extending upwards about two feet. Between the elevator platform and the entrance to. the well there was a space of one inch. While the elevator was ascending, as it neared the spinning room, the plaintiff’s heel was caught between the elevator and the “recess” or “overhang.” The judge directed a verdict for the defendant.

There was no evidence of negligence on the defendant’s part. The condition of the elevator was open and plain to be seen. As was stated by Sheldon, J., in McDonald v. Dutton, 198 Mass. 398, 400, a case very similar to the one at bar, “The defendants had a right to assume under these circumstances that their servants riding upon this elevator would not allow their feet to go beyond the limits of the platform.” The plaintiff was instructed by a fellow employee when he began work, but received no instructions “whatsoever as to the construction of the elevator.” The defendant was not required to instruct the plaintiff and warn him of the danger of getting his foot caught if it projected over the limits of the platform. That was an obvious danger and must have been known to the plaintiff.

*521.The plaintiff contends that'an incompetent operator was in charge of the elevator, and that because of the defendant’s failure of duty in this respect he is entitled to recover. It is enough to say that there was no evidence to support this contention. The only fact relied on is that of the conduct of the operator at the time the plaintiff was injured. Even if the operator were negligent at that time, which we do not mean to intimate, it is not enough to show negligence on the part of the master in retaining him in its employ. Olsen v. Andrews, 168 Mass, 261. Smollett v. Ballou, ante, 197.

There was no error in excluding the evidence offered by the plaintiff, namely, to show that the construction of the elevator well was defective and that by placing a guard the injury could have been prevented. The construction of the elevator well and the absence of such a guard were obvious. O’Connor v. Whittall, 164 Mass. 563, and cases cited.

Exceptions overruled.