Its Explanation of the Rings
Overthrow of the Theory
Diffraction of Light
Colours produced by Diffraction
Colours of Mother-of-Pearl.


LECTURE III.

Relation of Theories to Experience
Origin of the Notion of the Attraction of Gravitation
Notion of Polarity, how generated
Atomic Polarity
Structural Arrangements due to Polarity
Architecture of Crystals considered as an Introduction to their
Action upon Light
Notion of Atomic Polarity applied to Crystalline Structure
Experimental Illustrations
Crystallization of Water
Expansion by Heat and by Cold
Deportment of Water considered and explained
Bearings of Crystallization on Optical Phenomena
Refraction
Double Refraction
Polarization
Action of Tourmaline
Character of the Beams emergent from Iceland Spar
Polarization by ordinary Refraction and Reflection
Depolarization.