Newton, Sir Isaac, the mathematician, i, 341; v, 134; xii, 84, 195, 409; and the Bible, xii, 38; boyhood of, xii, 12; discovery of the law of gravitation, xii, 31; fame of, xii, 40; Galileo compared with, xii, 37; insanity of, viii, 255; inventor of the spectrum, xii, 34; Laplace on, xii, 44; Leonardo compared with, vi, 43; Milton compared with, xii, 28; Samuel Pepys and, xii, 42; John Ray and, xii, 277; Herbert Spencer on, x, 366; xii, 13; Mary Story and, xii, 23; on the transmutation of metals, xii, 36; Turner and, i, 131; Voltaire on, x, 366; Voltaire's sketch of, xii, 30. New woman, the, ii, 53. New York compared with London, ii, 118. New Zealand, i, p xxv. Niagara Falls, i, p xxv; Stratford compared with, i, 309; referred to by Goldsmith, i, 296. Nicholas V, Pope, quoted, vi, 31. Nicolay and Hay, life of Lincoln, ii, 303. Nietzsche, Friedrich, and Wagner, xiv, 35. Niggerheads, i, p xxii. Nightingale, Florence, ii, 83. _Night_, Michelangelo, iv, 32. _Night_, Thorwaldsen, vi, 122. _Nightwatch_, Rembrandt, iv, 74. _Nocturne_, Whistler, vi, 345. _Non-conformist, The_, Spencer's contributions to, viii, 332. Non-resistance, ii, 191. Nordau, Max, i, 163; vi, 286. Norsemen, home of, x, 127. North, Christopher, v, 266; xi, 264. Northcote, artist, iv, 318. North Pole, ii, 65. North Temperate Zone, the, v, 282. Northumberland, Earl of, i, 297. Northwest Territory, cession of, iii, 75. Nostalgia, v, 86; vi, 301; xiv, 79. _Notes and Comments_, Spencer, viii, 336. _Not so Bad as We Seem_, Bulwer-Lytton, i, 250. Novalis on Spinoza, viii, 233. Novelist, art of the, i, 266; iii, 189. Noy, Attorney-General, domdaniel of attorneys, ix, 315. Noyes, John Humphrey, x, 117; xi, 167. Nunneries, vii, 112. Nurse, the trained, viii, 12. O'Connell and Disraeli, v, 336. O'Connor, T. P., xiii, 177. Octavia, wife of Mark Antony, vii, 70. Octavius Caesar, vii, 61. _Oedipe_, Voltaire, viii, 287. Officialism in America, vi, 146. Oglethorpe, James, and the Wesleys, ix, 27. Oil-painting, introduction of, vi, 259. Old maids, Charles Lamb on, ii, 214. _Old Oaken Bucket, The_, i, 223. _Old Temeraire, The_, Turner's painting of, i, 137. Olivarez and Richelieu, vi, 167, 180. Oliver chilled plow, the, xi, 65. Oliver, James, boyhood of, xi, 53; Rev. Robert Collyer and, xi, 79; George H. Daniels and, xi, 82; William Morris compared with, xi, 74; religion of, xi, 66, 84; Daniel Webster compared with, xi, 78; wife of, xi, 61, 88. Olympian games, i, 279. Olympus, iv, 18. Omar Khayyam, v, 149; quoted, xiii, 97. Oneida Community, the, ii, 189; x, 118; xi, 42, 167. One-price system, the, ix, 131. _On Liberty_, John Stuart Mill, i, 95; xiii, 142. _On the Sublime_, Burke, i, 229; vii, 172. _On the Wings of Song_, Mendelssohn, xiv, 183. _Open Boat, The_, Crane, xiv, 80. _Opium Eater, The_, De Quincey, i, 217. Optics, the law of, viii, 167. Orange, Prince of, iv, 82.