in fact, a combined body-ventilating and paratus comprises a platform, which is laid on a slop- faces are connected by flat surfaces which may be form-shaping apparatus. It comprises a belt fitted to ing beach with its lower end extending into the water. called windows. The inclined faces are… … the upper stretch of the belt, they are charge of the jets of air from the belt. SURF-ACTUATED MOTOR. inverted and emptied of water. A ca- The breathing thus effects the release ble conveys the motion of the chain of numerous jets of fresh air over of buckets to a train of gearing mounted in a…
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