MCA21

At lifesaving stations, guards patrol the beach. They walk up and down the shore, looking continually for ships in great need of help. A guard walks five miles up the beach to a post where a key is hanging. With this key he winds a watchlike device which he has with him. He does this to make a record that will prove to the captain in charge of the station that he has walked the five miles. The guard then walks back to the station and continues walking to a post five miles beyond it. Again at this second post he winds the watch. While thus patrolling the beach the guard looks for anything that might have been washed in by the tide and reports what he has found.

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