The earliest evidence of "a
magnifying device, a convex lens forming a magnified image," dates back to
424 BC Aristophanes "lens" is a glass globe filled with water. (Seneca
says that it can be used to read letters no matter how small or dim), Roger
Bacon described the properties of magnifying glass in 13th-century England,
followed by the development of eyeglasses in 13th-century Italy
It will make a great addition to any
maritime collection.
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