The Rain Gauge
Ever see a glass vial with markers on the side of it? Do you get curious on why that vial is in the yard? That vial is called a rain gauge and them markers on the side of the vial tells them how many inches of rain fall there was for that day. The reason gardeners and even farmers use rain gauges is that how much inches of rain watered their plants for example if the rain gauge shows under a inch of rain they water their crops but if there is over a inch of rain they will hold off until a day or two of the rain fall until they water their crops. If you are interested in purchasing a rain gauge you can find them near in the local garden center.