Map of the continental United States, illustrating the rainfall in different areas.

Map of rainfall in the United States

Map of the continental United States, illustrating the rainfall in different areas.

"A Rain Gauge is an instrument or contrivance for measuring the amount of rain which falls on a given surface."—(Charles Leonard-Stuart, 1911)

Rain Gauge

"A Rain Gauge is an instrument or contrivance for measuring the amount of rain which falls on a given…