Chapter V On the Nature and Properties of Light
Section I.—The compound Nature of Light.—Its decomposition into elementary coloured rays.—Division of these rays into Luminous, Heat-producing, and Chemical Rays
Section II.—The Refraction of Light.—Phenomena of simple refraction by parallel and inclined surfaces.—Refraction from curved surfaces.—The various forms of Lenses.—The Foci of Lenses.—Formation of a Luminous Image by a Lens
| Section III.—The Photographic Camera.—Its simplest form.—The field of the Camera.—Chromatic aberration.—Spherical aberration.—The use of Stops.—The double, or Portrait combination of Lenses.—Variation between the Visual and Chemical Foci in Lenses | 54 |
| Section IV.—The Photographic Action of Coloured Light.—Diagram of Chemical Spectrum.—Illustrative experiments.—Superior sensibility of Bromide of Silver to coloured light.—Mode in which dark-coloured objects are Photographed | 60 |
| Section V.—On Binocular Vision and the Stereoscope.—Phenomena of Binocular Vision.—Theory of the Stereoscope.—Wheatstone’s reflecting Stereoscope.—Brewster’s Stereoscope.—Rules for taking Stereoscopic pictures | 66 |