Chromatic Phenomena produced by Crystals in Polarized Light
  The Nicol Prism
  Polarizer and Analyzer
  Action of Thick and Thin Plates of Selenite
  Colours dependent on Thickness
  Resolution of Polarized Beam into two others by the Selenite
  One of them more retarded than the other
  Recompounding of the two Systems of Waves by the Analyzer
  Interference thus rendered possible
  Consequent Production of Colours
  Action of Bodies mechanically strained or pressed
  Action of Sonorous Vibrations
  Action of Glass strained or pressed by Heat
  Circular Polarization
  Chromatic Phenomena produced by Quartz
  The Magnetization of Light
  Rings surrounding the Axes of Crystals
  Biaxal and Uniaxal Crystals
  Grasp of the Undulatory Theory
  The Colour and Polarization of Sky-light
  Generation of Artificial Skies.

LECTURE V.

  Range of Vision not commensurate with Range of Radiation
  The Ultra-violet Rays
  Fluorescence
  The rendering of invisible Rays visible
  Vision not the only Sense appealed to by the Solar and Electric Beam
  Heat of Beam
  Combustion by Total Beam at the Foci of Mirrors and Lenses
  Combustion through Ice-lens
  Ignition of Diamond
  Search for the Rays here effective
  Sir William Herschel’s Discovery of dark Solar Rays
  Invisible Rays the Basis of the Visible
  Detachment by a Ray-filter of the Invisible Rays from the Visible
  Combustion at Dark Foci
  Conversion of Heat-rays into Light-rays
  Calorescence
  Part played in Nature by Dark Rays
  Identity of Light and Radiant Heat
  Invisible Images
  Reflection, Refraction, Plane Polarization, Depolarization,
    Circular Polarization, Double Refraction, and Magnetization of
    Radiant Heat

LECTURE VI.

  Principles of Spectrum Analysis
  Prismatic Analysis of the Light of Incandescent Vapours
  Discontinuous Spectra
  Spectrum Bands proved by Bunsen and Kirchhoff to be characteristic
    of the Vapour
  Discovery of Rubidium, Caesium, and Thallium
  Relation of Emission to Absorption
  The Lines of Fraunhofer
  Their Explanation by Kirchhoff
  Solar Chemistry involved in this Explanation
  Foucault’s Experiment
  Principles of Absorption
  Analogy of Sound and Light
  Experimental Demonstration of this Analogy
  Recent Applications of the Spectroscope
  Summary and Conclusion

APPENDIX.

On the Spectra of Polarized Light

Measurement of the Waves of Light

INDEX

ON LIGHT

LECTURE I.