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doi: 10.1038/074541c0
Is it not the case that the second rainbow seen by your correspondent (p. 516) was caused by the reflection of the sun in the sea? If this were so, naturally persons some miles west of Deerness, or inland, would not have seen it. I once saw the appearance of double rainbows beautifully manifested in Ranenfjord, on the coast of Norway, and the explanation which I have given is that which found most favour with the passengers on our steamer.
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