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The Influence of the Blue Ray of the Sunlight and of the Blue Color of the Sky (1877)

Thursday 15 September 2016 at 17:22

True to the ideas held within — that blue light is bearer of unique and special properties — this book is entirely printed with blue ink on blue paper.

Source: http://publicdomainreview.org/collections/the-influence-of-the-blue-ray-of-the-sunlight-and-of-the-blue-color-of-the-sky-1877/