Since antiquity, people have searched for a way to understand the colors we see-what they are, how many there are, and how they can be systematically identified and arranged in some kind of order. How to order colors is not merely a philosophical question, it also has many practical applications in art, design, and commerce. Our intense interest in color and its myriad practical applications have led people throughout history to develop many systems to characterize and order it. The number of color order systems developed throughout history is unknown but ranges in the hundreds. Many are no longer used, but continue to be of historical interest. Despite wrong turns and slow progress, our understanding of color and its order has improved steadily. Although full understanding continues to elude us, it seems clear that it will ultimately come from research in neurobiology, perception and consciousness. Color Ordered is a comprehensive, in-depth compendium of over 170 systems, dating from antiquity to the present. In it, Rolf Kuehni and Andreas Schwarz present a history and categorization of color systems, describe each one using original figures and schematic drawings, and provide a broad review of the underlying theory. Included are a brief overview of color vision and a synthesis of the various systems. This volume is a unique and valuable resource for researchers in color vision, and visual perception, as well as for neuroscientists, art historians, artists, and designers.

By the Rays of Light I understand its least Parts, and those as well Successive in the same Lines, as Contemporary in several Lines. For it is manifest that Light consists of Parts, both Successive and Contemporary; because in the same place you may stop that which comes one moment, and let pass that which comes presently after; and in the same time you may stop it in any one place, and let it pass in any other. For that part of Light which is stopp'd cannot be the same with that which is let pass. The least Light or part of Light, which may be stopp'd alone without the rest of the Light, or propagated alone, or do or suffer any thing alone, which the rest of the Light doth not or suffers not, I call a Ray of Light. Refrangibility of the Rays of Light, is their Disposition to be refracted or turned out of their Way in passing out of one transparent Body or Medium into another. And a greater or less Refrangibility of Rays, is their Disposition to be turned more or less out of their Way in like Incidences on the same Medium. Mathematicians usually consider the Rays of Light to be Lines reaching from the luminous Body to the Body illuminated, and the refraction of those Rays to be the bending or breaking of those lines in their passing out of one Medium into another. And thus may Rays and Refractions be considered, if Light be propagated in an instant. But by an Argument taken from the Æquations of the times of the Eclipses of Jupiter's Satellites, it seems that Light is propagated in time, spending in its passage from the Sun to us about seven Minutes of time: And therefore I have chosen to define Rays and Refractions in such general terms as may agree to Light in both cases.

DigiCat Publishing presents to you this special edition of "Opticks" (Or, A Treatise of the Reflections, Refractions, Inflections, and Colours of Light) by Isaac Newton. DigiCat Publishing considers every written word to be a legacy of humankind. Every DigiCat book has been carefully reproduced for republishing in a new modern format. The books are available in print, as well as ebooks. DigiCat hopes you will treat this work with the acknowledgment and passion it deserves as a classic of world literature.

Does the phrase 'going forward' make you sick to the back teeth? Does the idea of a 'nurture bubble' make your blood boil? Steven Poole takes a tongue-in-cheek look at the meaningless corporate jargon that irritates employees up and down the country.