| 摘要 |
A rain gauge comprising a graduated open end rain collection tube having fins on its lower end. The tube is pivotally mounted at its mid point on a pin secured to one end of a swivel arm rudder, the other end of said swivel arm rudder being mounted for rotation on the end of a support rod stuck into the ground. Wind on the rudder and fins causes the tube to tilt and turn into the wind with the open end facing the rain.
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