Chapter V: ELECTRICITY, LIGHT, HEAT, ETC.--Some Facts in regard to Telescopic

and Stereoscopic Vision.--The Centenary of the Birth of Sir Humphry Davy. His boyish days. His first chemical experiments. His first lecture at the Royal Institution. A very entertaining biographical sketch.--Light and Heat in Gas Flames.--Nickel Needles for Compasses.--The Nature of the Elements.--A New Compound Prism for Direct Vision Spectroscopes.