(b) Reflection of Light (Vol. 23, p. 2); Absorption (Vol. 1, p. 76); Refraction (Vol. 23, p. 25); Dispersion (Vol. 8, p. 315); Interference (Vol. 14, p. 685); Polarization of Light (Vol. 21, p. 932).
(c) Shadow (Vol. 24, p. 738); Diffraction (Vol. 8, p. 238); Calorescence (Vol. 5, p. 60); Fluorescence (Vol. 10, p. 375); Phosphorescence (Vol. 21, p. 476).
(d) Mirror (Vol. 18, p. 575); Lens (Vol. 16, p. 421); Caustic (Vol. 5, p. 558); Aberration (Vol. 1, p. 54).
(e) Corona (Vol. 7, p. 184); Halo (Vol. 12, p. 864); Mirage (Vol. 18, p. 573); Rainbow (Vol. 22, p. 861); Sky (Vol. 25, p. 202); Twilight (Vol. 26, p. 492)—see also Dust (Vol. 8, p. 713).
(f) Telescope (Vol. 26, p. 557); Microscope (Vol. 18, p. 392); Objective (Vol. 19, p. 948); Camera Lucida (Vol. 5, p. 104); Camera Obscura (Vol. 5, p. 104); Binocular Instrument (Vol. 3, p. 949); Stereoscope (Vol. 25, p. 895).
(g) Vision (Vol. 28, p. 130).
Far reaching developments are described in Photography (Vol. 21, p. 485) and Spectroscopy (Vol. 25, p. 619). In the former article Sir W. de W. Abney describes in great detail photographic Processes; Major-General Waterhouse, Apparatus and Lenses, while A. H. Hinton discusses the Pictorial aspect of the subject. There are also valuable articles on Celestial Photography (Vol. 21, p. 523), by Professor Turner, and on the SpectroHeliograph (Vol. 25, p. 618), by the inventor, G. E. Hale, director of the Solar Observatory of the Carnegie Institution at Mount Wilson, Cal. The relation between magnetism and light is discussed in an article Magneto-Optics (Vol. 17, p. 388), by Sir J. J. Thomson.
(IV) Heat
The treatment of this subject in the Encyclopaedia Britannica has been generally organized by Prof. H. L. Callendar, of the Royal College of Science, London, who was designated by Lord Kelvin as his successor in this department of the work. In pursuing the subject the following order may conveniently be followed:
(a) Heat (Vol. 13, p. 135), Thermometry (Vol. 26, p. 821), Calorimetry (Vol. 5, p. 60), and Thermodynamics (Vol. 26, p. 808), all by Professor Callendar; Cold (Vol. 6, p. 663).