Light visible and invisible : a series of lectures delivered at the Royal Institution of Great Britain, at Christmas, 1896 (1897)
Thompson, Silvanus Phillips, 1851-1916, Royal Institution of Great Britain · New York : Macmillan · leaf 73
magicproperty of the mirrors. It results, in fact, from anaccident of manufacture. Not all Japanese mirrorsshow the property : those that show it best are generallythin, and with a slightly convex face. It was demon-strated by Professor Ayrton, and I have since accumu- 52 LIGHT LECT. lated some… … Fig. 37. they are laid down on their backs by the workman, whoscrapes them violently with a blunt iron tool, using greatforce. Fig. 37 is taken from a Japanese print in theBritish Museum. During this process they becomeslightly convex. The polishing is completed by scouring 1 These differences of…
Light · X-rays
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