Question

Why do you think the glass measuring cylinder of the rain gauge is inside an outer container?​

Answer 1

For some rain gauges, it's to support a funnel so the depth of water will be greater so you can read it more accurately.

Answer 2

Why is the glass measuring cylinder of the rain gauge inside an outer container? For some rain gauges, it's to support a funnel so the depth of water will be greater so you can read it more accurately..