Archive image from page 483 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana03todd Year: 1847 vertical line, not only the time of swinging the leg has increased, but also the time in which both legs are resting on the earth; for the latter commences at the instant when the forward leg has reached the ground, and termi- nates when the head of the femur has arrived at the vertical line, passing through the point of support of the same foot. The time aug- ments in proportion to the distance which the swinging leg passes beyond the vertical posi- tion, or
Archive image from page 483 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana03todd Year: 1847 vertical line, not only the time of swinging the leg has increased, but also the time in which both legs are resting on the earth; for the latter commences at the instant when the forward leg has reached the ground, and termi- nates when the head of the femur has arrived at the vertical line, passing through the point of support of the same foot. The time aug- ments in proportion to the distance which the swinging leg passes beyond the vertical posi- tion, or half oscillation. The time when both legs are resting is greatest in fig. 260, because it must be sufficiently great for the head of the femur, together with the whole trunk, to advance to a position directly over the foot, during which the head of the femur moves very slowly, and by the direction of the for- ward leg its action is to retaid the horizontal advance of the centre of gravity. The time is less infg. 259, because the head of the femur has to pass through a less space, and the sup- porting leg acts against the trunk at a less angle; but in Jig. 258 the time of both legs resting at the same time, disappears altogether. The two legs complete the least portion possi- ble of the vibrating curve, and the duration of each step amounts only to the time of half an oscillation. In walking very slowly we may suffer the swinging leg to vibrate so long, that it partly returns to its former position before it reaches the ground. We have seen in quick walking that during the time both legs rest on the ground, the ad- vanced leg continually forms a smaller angle with the vertical than the hinder leg; but in very slow walking the forward leg may form a greater angle with the vertical than the hinder k1; the magnitude of this angle determines the kind of gait the walker acquires. In order to accomplish this, the swinging leg is suffered nearly to complete its curve of oscillation b
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