Principles of Universal Physiology; A Reform in the Theories of Physics, Chemistry, Biology, and Cosmology

Principles of Universal Physiology; A Reform in the Theories of Physics, Chemistry, Biology, and Cosmology

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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. 1889 edition. Excerpt: ... when the propagation is regular or completely uniform, the rays following a rectilinear direction from the incandescent body to our eyes; such a rectilinear direction can be broken by some refracting body, but the incident and emergent rays always continue parallel. The sensation called white colour is produced when rays of light are reflected by a body in an incomplete or defective manner--that is, when part of the light is refracted or absorbed, yet follows a parallel course until it reaches the eye. From this arises the analogy between white and colourless light, both being indiscriminately called white. Progene, losing this parallelism, follows an oblique course, and propagates the emissions which compose a number of rays of light with different amplitudes and rapidity; and from this complexity is produced one, many, or all the colours of the scale seen in a complete luminous spectrum, as that of a clear rainbow. The results from experiments with coloured light have been erroneously considered by authors as facts belonging to the most simple light. It is evident that without light we cannot perceive colours; but the inverse proposition is not true, as colourless light, like the sunshine, is seen directly by the eye. Colours are to light as struer to musical tones; colour is a synthetic character, resulting from the union of emissions which differ in amplitude and celerity. Propagation of light is a translatory movement consisting of minuteand progressive emissions of progene, therefore it must have some analogy to sonorous propagation; and in THEORY OF LIGHT 73 its perception it is also pretty similar to sound, because the organ of sight is a mediate sense, like the organ of hearing. Nevertheless, light and sound differ in the form...
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Product details

  • Paperback | 40 pages
  • 189 x 246 x 2mm | 91g
  • United States
  • English
  • black & white illustrations
  • 1236982037
  • 9781236982032