. The camera and the pencil, or, The heliographic art : its theory and practice ... together with its history in the United States and in Europe ... . nature of the suns luminous the several kinds of harmony of colors, the two prin-cipal are the harmony of analogy, and the harmonyof contrast. By the harmony of analogy is meant that order inwhich the colors occur, as they are displayed in theprismatic spectrum. That is, from one of the primitivecolors you pass, by scarce distinguishable gradations,through numerous intermediate shades of color to thenext primitive, and so onward through
. The camera and the pencil, or, The heliographic art : its theory and practice ... together with its history in the United States and in Europe ... . nature of the suns luminous the several kinds of harmony of colors, the two prin-cipal are the harmony of analogy, and the harmonyof contrast. By the harmony of analogy is meant that order inwhich the colors occur, as they are displayed in theprismatic spectrum. That is, from one of the primitivecolors you pass, by scarce distinguishable gradations,through numerous intermediate shades of color to thenext primitive, and so onward through the whole. Com-plete specimens of this species of harmony may often bewitnessed in the sunrise and sunset clouds and of the same is seen frequently in extensiveprospects, embracing sky, land, and water, though io 74 THE CAMERA AND THE PENCIL. general variety is given to this spectacle by tlie occa-sional introduction of tlie harmony of contrast. What is meant by this latter phrase may, perhaps, beapprehended most clearly from the following diagrams,which help to illustrate certain peculiarities of color. Red. / iP \ / 7 \ ^olet or purple. \ e / \ /» / Sreen. There are several points here requiring notice. Infigure 1st, it will be observed that the primaiy color,blue, occupies full double the space in the spectrum ofthe other two primaries, red and yellow. Thus repre-senting the proportions by figures, 2 will stand for red;3 for yellow; and 5 for blue. The intermediate colors noted down in this diagramare called secondaries; and a peculiarity belonging tothem is, that the secondary standing opposite to a par-ticular primary is formed by combining the two otherprimaries. Thus green, standing over against red, is acompound of blae and yellow; orange, opposed to blue,of red and yellow; and violet, opposite yellow, of blueand red. These secondaries are commonly called thecompiJeinents of the opposing primaries, because, being acomposite of two primaries, they
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectphotogr, bookyear1864
