=Faraday=, Michael, birth, 238; life in Jacob's Well Mews, 238; becomes an errand-boy, 239; apprenticeship, 239; attends lectures at Tatum's, 240; constructs a voltaic pile, 241; letters to Abbott, 241, 246; starts as a journeyman, 243; application to Davy, 243; appointed assistant at the Royal Institution, 245; joins the City Philosophical Society, 245; opinions respecting lectures, 246, 247; journey with Davy, 248; acquaintance with De la Rive, 249; crosses the Alps, 249; at the Academia del Cimento, 250; returns from the Continent, 251; lectures to the City Philosophical Society, 251; commonplace-book, 253; atmospheric electricity apparatus, 254; marriage, 255; discovery of electro-magnetic rotation, 255; of the earth's action on a current, 256; letter to E. de la Rive, 256; views on Ampere's theory, 257; elected F.R.S., 258; appointed director of the laboratory at the Royal Institution, 258; work on optical glass, 259; discovery of induced currents, 259; institutes Friday evening lectures, 259; anchor-ring experiment, 260; magneto-electric machine, 262; obtains induced current by action of the earth, 262; obtains "magnetic spark," 262; explanation of Arago's experiment, 264; laws of electrolysis, 266; proves the identity of frictional and voltaic electricity, 266; experiments on self-induction, 268; diagrams of lines of magnetic force, 269; conception of lines of electric force, 270; ice-pail experiment, 270; butterfly-net, 270; experiments on specific inductive capacity, 272; appointed scientific adviser to Trinity House, 273; appointed member of the Senate of the University of London, 273; discovery of the electro-magnetic rotation of the plane of polarization, 273; investigations in diamagnetism, 274; joins the Sandemanian Church, 275; lectures before the Prince Consort, 275; retirement to Hampton Court, 277; death, 277; lines of force investigated by Thomson and Maxwell, 300. Forbes's, Principal, opinion of Young, 194. Foucault's measurement of the velocity of light, 220. _Fovea centralis_, insensibility of, to blue light, 298. Franciscus Linus, funicular hypothesis of, 25.