CHAPTER XVI. LIGHT.

(1) Rectilinear Propagation of Light 388 (2) Photometry and Law of Reflection 393 (3) Mirrors and Formation of Images 400 (4) Refraction of Light 410 (5) The Formation of Images by Lenses 416 (6) Optical Instruments 423 (7) Color and Spectra 430 (8) Nature of Light 442