Gents Mag 1740 p.130

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	Gentleman's Magazine vol.10 p.130, 1740:-
optics   reflections
	Opitics Mr. URBAN. As the following Optical Phaenomenon is not yet taken notice of by the Writers on that Subject, it may probably not be unacceptable if propos'd in your Mag. that some of these Literati may account for it from their Principles. Looking at the Moon (by accident) in a common plain Mirror or Looking-Glass, which I held in such a Position as to see her Body there, I was very much surpriz'd to see her multiply'd into four distinct Spectrums, at some distance from each other. I try'd the same Experiment with the Sun, and the like happen'd to him also. How is this to be accounted for in a plain polish'd Mirror, where other Objects appear only single, as daily Practice confirms? Note the Spectrums are gradually darker on each side of the true reflected Image, sometimes they are five, and in some Glasses but three, and never fewer; Yours, G. S.
	The consequent correspondence is not short, and has not been transcribed, but see:-
	continued

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