• A.
• Abbott, Faraday's letters to, 241, 246.
• Aberdeen University, Maxwell appointed professor in, 284;
• Young's report on, 203.
• Absorption, Rumford's experiments on, 185;
• of sun's rays by cloth of different colours, 99.
• Academy of Sciences, Franklin nominated Foreign Associate of, 111.
• Adjustment of the eye, Young's paper on the, 200.
• Æpinus's completion of Franklin's theory, 77.
• Air, Boyle's conception of the constitution of, 19.
• Air-pump, Boyle's experiments with, 19;
• constructed by Boyle, 27.
• American Independence, Declaration of, 113.
• American Philosophical Society, foundation of, 61.
• AmpÈre's theory, Faraday's views on, 257.
• Anchor-ring experiment, Faraday's, 260.
• Arago's experiment, 264.
• Argand lamp, efficiency of, 188.
• Armstrong gun, principle of the, 180.
• Atmospheric electricity, Faraday's experiments on, 254;
• obtained by a pointed rod, 84.
• Autobiography of Franklin, 39.
• Availability of energy, 326.
• B.
• Baily, Francis, repetition of the Cavendish experiment by, 146.
• Beats in music, explanation of, 209.
• Beggary in Bavaria banished by Rumford, 164.
• Bernoulli's, Daniel, molecular theory of gases, 299.
• Boston, blockade of, 110.
• Boyle, Hon. Robert, birth, 8;
• conversion, 11;
• first air-pump, 17;
• conception of the constitution of the air, 19;
• experiments with the air-pump, 19, et seq.;
• argument on the cause of a vacuum, 23;
• experiments establishing his law, 25;
• statement of his law, 29;
• observations on cold, 32,
• and on the expansion of water in freezing, 33;
• experiments on induced magnetism, 34;
• the province of experimental science, 37.
• Boyle's law, 29.
• Brocklesby, Dr., death of, 208.
• Brougham's criticisms of Thomas Young, 218.
• Bumper, electrical, 80.
• C.
• Camera obscura, invention of, 2.
• Canada balsam, stresses in, 298.
• Candle-flame, effect of, in discharging electricity, 75.
• Capacity, electrical, 137;
• Franklin's experiments on, 81, 89;
• Cavendish's unit of, 138;
• Cavendish's measures of, 134, 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.
• Franklin, Benjamin, autobiography of, 39;
• birth, 40;
• on the disputatious temper, 42;
• method of learning prose composition, 43;
• tries vegetarianism, 44;
• adopts the Socratic method, 44;
• first voyage to England, 48;
• experience as a journeyman in London, 49;
• views on beer as a food, 49;
• marriage, 54;
• endeavours to attain moral perfection, 56;
• method of reconciling an enemy, 60;
• elected F.R.S., 66;
• second voyage to England, 70;
• begins electrical experiments, 72;
• electrical papers ridiculed by the Royal Society, 73;
• discovers the effect of points, 74;
• one-fluid theory of electricity, 76;
• theory of the Leyden jar, 78;
• invention of the lightning-rod, 83;
• golden fish, 85;
• view of the nature of light, 86;
• kite, 88;
• experiments on capacity, 81, 89;
• experiments on electrical induction, 90;
• proof of the absence of electricity in a hollow conductor, 91;
• third voyage to England, 102;
• examination before the Parliamentary Committee, 105;
• nominated Foreign Associate of the Academy of Sciences, 110;
• signs the Declaration of Independence, 113;
• sent to Paris, 113;
• made Minister Plenipotentiary to the Court of France, 116;
• signs the Treaty of Peace, 119;
• elected President of Pennsylvania, 120;
• death, 122.
• Fresnel, awarded the Rumford Medal, 233.
• Fresnel's repetition of Young's experiments, 223.
• Moral perfection, Franklin's endeavour to attain, 56.
• Mother-of-pearl, Young's explanation of the colours of, 224.
• N.
• Nautical Almanack, Young appointed superintendent of the, 232.
• Newton's analysis and synthesis of white light, 213;
• rings, Young's explanation of, 222;
• theory of light, 219.
• Nicol prisms given to Clerk Maxwell, 282.
• O.
• Œrsted's discovery, 255.
• Ohm's law, discovered by Cavendish, 143;
• meaning of, 143.
• Optical glass, Faraday's work on, 259.
• Otto von Guericke, contributions of, to electricity, 3;
• experiments of, with the Magdeburg hemispheres, 17.
• P.
• Paris, Dr., Faraday's letter to, 243.
• Pascal takes a barometer up the Puy de Dome, 17.
• Pennsylvania fireplace invented by Franklin, 63;
• Gazette published by Franklin, 53.
• Perpetual motion, Rumford's contrivances for, 150;
• impossibility of, 322.
• Philadelphia, Franklin's first arrival in, 46;
• Library, foundation of the, 55.
• Photometer, Rumford's, 187.
• Pigments, effects of mixing, 217.
• Points versus knobs, 95, 131.
• Polarization, explained by transverse vibrations, 226;
• of light discovered by Malus, 226.
• "Poor Richard's Almanack," 60.
• Pressure of the air the cause of suction, 29.
• R.
• Radiation, Rumford's experiments on, 184;
• of cold, Rumford's experiments on, 186.
• Rede Lecture, delivered by Clerk Maxwell, 293.
• Refraction of light, laws of, 1;
• mentioned by Pliny, 1.
• Relative economy of different sources of light, 188.
• Resistance of conductors, Cavendish's experiments on, 142.
• Roemer, measurement of the velocity of light by, 2.
• Rosetta Stone, discovery of the, 234;
• inscription on, 234.
• Royal Institution, foundation of the, 169;
• Young's lectures at the, 212;
• Faraday's appointment at the, 245;
• Maxwell's lecture on colour at the, 287.
• Royal Society, origin of the, 13-15.
• Rumford, Count, birth and parentage, 148;
• life as a medical student, 153;
• becomes a schoolmaster at Concord, 154;
• marriage, 154;
• summoned before the Committee of Safety, 156;
• imprisoned at Woburn, 156;
• first journey to London, 1 "pginternal">231;
• appointed physician in St. George's Hospital, 231;
• superintendent of the Nautical Almanack, 232;
• death, 233.

PRINTED BY WILLIAM CLOWES AND SONS, LIMITED,
LONDON AND BECCLES.