Manual for Primary Grades; Including Outline by Lessons

Manual for Primary Grades; Including Outline by Lessons

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1894 edition. Excerpt: ...are, however, sufficiently definite to admit of being used as standards, and all uncertainty of color names is thereby avoided. Pure Color.--The white light of the sun is compounded of an almost innumerable series of colored elements. When waves of light of all possible lengths act simultaneously upon the eye the sensation of white is produced; but when waves all of the same length act upon the eye a color sensation is produced. If a definite color sensation is generated, and the sensation of white, or of white light, is added, the effect of this addition will be to diminish the action of the colored light and the mixture will be paler than the original color. Color that is entirely free from white light is termed; pure color. The pure standard colors are those found in the spectrum, and all colored light coming from painted surfaces should be compared with the spectrum to determine its purity. The pale color produced by the addition of white to a pure standj ard color is called a tint. The tints vary in strength according to the amount of white light added; the intenser the light the paler the tint. The number of tints that may be produced by subjecting a pure or standard color to different effects of illumination cannot he limited. These variations in tint are termed degrees, the value "of which changes with their nearness to or remoteness from the pure color. Each degree of a color is also called a tone; hence the value 1 of a tint depends upon its nearness to the pure color, or uponjts_j tone. Under a feeble light the pure, or standard, color will be in shade, or appear quite dark; and since the color of all objects is derived from the light, in the absence of light there is no color. The darker colors produced by a feeble light are...show more

Product details

  • Paperback | 46 pages
  • 189 x 246 x 3mm | 100g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236609638
  • 9781236609632