UNCLES and aunts do not beget their nephews and nieces, 367, 376 Unconscious, our acquired habits come to be done as unconsciously as though instinctive, on repetition, 56 ---- difference between my view of the, and Von Hartmann's, 58 Unconsciousness, the, with which habitual actions come to be performed, 37, 38, 39, 56-58, 67, 203, 332, 381 Understanding, the peace of mind that passeth, 35 Unity of the individual, Buffon on the, 127, 128. (_See_ "Oneness") "Unknown causes," according to Mr. Darwin, can do so much, but not so much more, 359 ---- their identity with spontaneous variability, 359 ---- heredity only another name for, unless the "Life and Habit" theory be adopted, 384 Upright position in man and certain apes, and children, Lamarck on, 312 Upside down, the vertebrata are perambulating vegetables planted, 137 Use and organ, 44, 45, 47, 217, 218, 221, 292, 294, 296, 299, 301, 302, 304, 305, 307-309, 311, 323 VACUUM, an omniscient and omnipotent, 28 Vague, efforts and desires are vague in the outset, 47, 52, 384 Variation, C. Darwin declares the fact of variation to be the cause of variation, 8, 9, 347, 369 Variations, one factor of modification provides, the other accumulates, 227 ---- Lamarck strove to discover the law underlying, 337 ---- C. Darwin sees no cause underlying them, 339, 340 ---- according to Lamarck, they will tend to appear in definite directions in large numbers of individuals, for long periods together; according to C. Darwin they will not do thus, 341 ---- must appear before they can be preserved, 346 ---- the cause of variations is the cause of species (Professor Mivart on this), 370 Vary, man cannot vary his practices much more than animals can, 55 "Vestiges of Creation," the, 65 ---- C. Darwin on the, 65 ---- the author of, on Lamarck, 247 ---- Darwin's treatment of, 247, 248 Virtue has ever erred on the side of excess than on that of asceticism, 35 Violin, a man who plays the, with his toes, 50 Vitally true, 227 Volition. (_See_ "Will") Voltaire, Buffon would not play the part of, 81 WALLACE, A. R., his review of Professor Haeckel's "Evolution of Man," 382-384 Want and power, interaction of, 44, 45, 47, 48, 217, 218, 221, 300, 323 Wasp, cutting a fly in half, Dr. Erasmus Darwin on, 205 Watch, Paley's argument from the, 13 Weaker, the strongest eat the, 282 Wealth, the normal growth of, and evolution, 222 Web-footed, how birds, became, 48, 49, 51 ---- development of, birds, Lamarck on, 305 ---- Paley on, 305 Wedge, Buffon let in the thin end of the wedge, by saying that changed habits modify form, 105, 106 Whisky, God keep you from--if he can, 176 Will, Patrick Matthew on, as influencing organism, 320-322. (_See_ also "Desire," "Design," "Want," "Wish") Will-o'-the-wisp, C. Darwin like a, 372 Wish and power, their interaction, 44, 45, 47, 48, 217, 218, 221, 300, 323 Wit, brevity may be its soul, but the leaders of science, &c., 315