This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1845 edition. Excerpt: ... PART III. PHYSICAL CHROMATICS. CHAPTER XII. CHEMICAL DOCTRINE OF LIGHT, SHADE, AND COLOURS. 294. Having dismissed the gesthetical analogy and chromatic relations and harmony of light, shade, and colours, we proceed finally to the physical doctrine and facts by which the premises of our work are ...
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1845 edition. Excerpt: ... PART III. PHYSICAL CHROMATICS. CHAPTER XII. CHEMICAL DOCTRINE OF LIGHT, SHADE, AND COLOURS. 294. Having dismissed the gesthetical analogy and chromatic relations and harmony of light, shade, and colours, we proceed finally to the physical doctrine and facts by which the premises of our work are confirmed on a solid foundation in nature and science. 295. According to our chemical doctrine of light and colours, delivered under other relations, and our brief inquiry into their physical causes, the ethereal matter, called electric, is light in a "Outlines of Analogical Philosophy," vol. II. p. 42; "Chromatography," chap. iv.; and Appendix to the first edition of this work. latent state, and light is the electric fluid, so called, in an active and sensible state; and as the latter has been identified with the ethereal matter, or power, called magnetic, and both the magnetic and electrical powers have two elementary corresponding states, which, in the former, are called polar, so, agreeably to these relations, is all light to be regarded as polar, or polarised; and it may hereafter be rendered evident that this is a universal, and not a specific, attribute or property of light. 296. Upon this foundation we have built our theory of the nature and relations of light and colours; regarding light as having two states, the one sensible, and the other latent, or as visual and electrical, and not as a simple substance, but as an effect of the concurrence of a double elementary power (electral and thamal), one element of which is the active principle of light, the other passive or reactive, and to be regarded as the principle of shade or darkness; the first coincident, if not identical, with the oxygen of the chemists, the other with hydrogen; for...
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