To perform my late promise to you, I shall without further ceremony acquaint you, that in the beginning of the Year 1666 (at which time I applyed my self to the grinding of Optick glasses of other figures than Spherical,) I procured me a Triangular glass-Prisme, to try therewith the celebrated Phænomena of Colours. And in order thereto having darkened my chamber, and made a small hole in my window-shuts, to let in a convenient quantity of the Suns light, I placed my Prisme at his entrance, that it might be thereby refracted to the opposite wall. It was at first a very pleasing divertisement, to view the vivid and intense colours produced thereby; but after a while applying my self to consider them more circumspectly, I became surprised to see them in an oblong form; which, according to the received laws of Refraction, I expected should have been circular. They were terminated at the sides with streight lines, but at the ends, the decay of light was so gradual, that it was difficult to determine justly, what was their figure; yet they seemed semicircular. Comparing the length of this coloured Spectrum with its breadth, I found it about five times greater; a disproportion so extravagant, that it excited me to a more then ordinary curiosity of examining, from whence it might proceed. I could scarce think, that the various Thickness of the glass, or the termination with shadow or darkness, could have any Influence on light to produce such an effect; yet I thought it not amiss, first to examine those circumstances, and so tryed, what would happen by transmitting light through parts of the glass of divers thicknesses, or through holes in the window of divers bignesses, or by setting the Prisme without so, that the light might pass through it, and be refracted before it was terminated by the hole: But I found none of those circumstances material. The fashion of the colours was in all these cases the same.

This volume collects together Newton's principal philosophical writings for the first time.

Unlike many other art books only give recipes for mixing colors or describe step-by-step painting techniques, *Color and Light* answers the questions that realist painters continually ask, such as: "What happens with sky colors at sunset?", "How do colors change with distance?", and "What makes a form look three-dimensional?" Author James Gurney draws on his experience as a plain-air painter and science illustrator to share a wealth of information about the realist painter's most fundamental tools: color and light. He bridges the gap between abstract theory and practical knowledge for traditional and digital artists of all levels of experience.

An experimental approach to the study and teaching of color is comprised of exercises in seeing color action and feeling color relatedness before arriving at color theory.

Johann Wolfgang von Goethe, although best known for his literary work, was also a keen and outspoken natural scientist. In the second polemic part of Zur Farbenlehre (Theory of Colours), for example, Goethe attacked Isaac Newton's ground-breaking revelation that light is heterogeneous and not immutable, as was previously thought.This polemic was unanimously rejected by the physicists of the day, and has often been omitted from compendia of Goethe's works. Indeed, although Goethe repeated all of Newton's key experiments, he was never able to achieve the same results. Many reasons have been proposed for this, ranging from the psychological — such as a blind hatred of Newtonism, self-deceit and paranoid psychosis — to accusations of incapability — Goethe simply did not understand the experiments. Yet Goethe was never to be dissuaded from this passionate conviction.This translation of Goethe's polemic, published for the first time in English, makes it clear that Goethe did understand the thrust of Newton's logic. It demonstrates that Goethe's resistance to Newton's theory stemmed from something quite different; his pantheism — the belief in the spiritual nature of light. This prevented him from allowing himself to think of light in physical terms and accepting that it is anything other than simple, immutable, and unknowable.This important new translation will be useful to natural scientists, historians, philosophers and theologians alike and will delight anyone hoping to add a further layer of nuance to Goethe's complex portrait.

This book offers a comprehensive introduction in to the various theories of colour and how they developed over the centuries and millennia. As colour is the perception of light by our brains, the book captures not only the physical phenomena but also psychological and philosophical aspects of colours. It starts with ancient studies of Greek philosophers and their insights into light and mirrors, then reviews the theory of colors in the middle ages in Europe and Middle East. The last big part of the book explains the theories of colours by modern scientists and philosophers, starting with Isaac Newton and ending colour schemes of modern digital pictures.

Traditional color theory can be confusing to artists, especially when they try to use inaccurate color wheels as guides to mixing their colors. Now, Color Theory Made Easy presents an alternative approach that cuts through the tangle of established but contradictory concepts that gives artists a universal theory that really applies to their work. Most artists have been taught that red, blue, and yellow are the primary colors hues that cannot be created from any combination of other colors. However, as a result of years of study, author and artist Jim Ames has concluded that the true primary colors are cyan (a greenish blue), magenta (a violet red), and a yellow that does not learn toward either cyan or magenta. In Color Theory Made Easy, Ames explains the importance of these three colors as the basis for all our thinking about color. Using friendly, clear language and colorful diagrams, the author lays the foundation in Chapter 1 for applying his color theory in art. He shows that all colors in nature are composed of varying percentages of cyan, magenta, and yellow. Chapter 2 builds on this with a survey of the pigment colors artists actually use. Here the author offers an essential education concerning paint selection, and he lists currently available tube colors that are the most accurate in terms of the true primaries. The final chapter explores color mixing principles based on cyan, magenta, and yellow, and applies these principles through a series of watercolor demonstrations. In this illuminating book, Jim Ames has broken new ground and given us a workable color theory that is both simple and indispensable."

Internationally renowned artist and best selling author Stephen Quiller shows readers how to discover their own personal "color sense" in Color Choices, a book that offers readers a fresh perspective on perfecting their own color styles. With the help of his own "Quiller Wheel," a special foldout wheel featuring 68 precisely placed colors, the author shows artists how they can develop their own unique color blends. First, Quiller demonstrates how to use the wheel to interpret color relationships and mix colors more clearly. Then he explains, step by step, how to develop five structured color schemes, apply underlays and overlays, and use color in striking, unusual ways. This book will bring out every artist's unique sense of color whether he or she works in oil, watercolor, acrylics, gouache, or casein.