What is the purpose of the capacitor?

4yr ⋅ ⋅

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Any idea what these are? Found metal detecting.

4yr ⋅

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475 in strasburg last weekend.

4yr ⋅

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What are these things on my maple tree. I’m pretty sure there eggs.

4yr ⋅

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How should I mount this in a project box?

4yr ⋅

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Can anyone tell me anything about this bottle I found in a creek? About 4 inches tall top is sealed and ball on top rolls like a ball point pen.

4yr ⋅

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