INDEX.
421
Theta-fuchsians, 345.
Theudius, 33.
Thomson, J., 385.
Thomson, Sir William, 395, 396; ref. to, 283, 315, 358, 381, 382, 383, 388, 391, 393, 394, 395, 399, 400, 403. See Kelvin (Lord).
Thomson's theorem, 359.
Thymaridas, 73.
Timæus of Locri, 29.
Tisserand, 377.
Tonstall, 158.
Torricelli, 171.
Triangulum characteristicum, 220.
Trigonometry, 51, 56, 98–100, 109, 110, 115, 135, 140, 141, 154, 160, 161, 165, 238, 242, 245, 249, 259; spherical, 57, 115, 280, 294.
Trochoid, 171.
Trouton, 394.
Trudi, 324.
Tucker, XIII.
Twisted Cartesian, 312.
Ubaldo, 183.
Ultimate multiplier, theory of, 379.
Ulug Beg, 114.
Universities of Cologne, Leipzig, Oxford, Paris, and Prague, 136.
Valson, XIII.
Van Ceulen. See Ludolph.
Variation of arbitrary consonants, 378.
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Venturi, 52.
Versed sine, 99.
Vibrating rods, 387.
Victorius, 79.
Viviani, 172.
Vlacq, 165.
Volaria, 237.
Von Helmholtz. See Helmholtz.
Vortex motion, 382.
Vortex rings, 382.
Waldo, 385.
Walker, 323.
Waltershausen, XI.
Wand, 400.
Wantzel, 328.
Watson, J. C, 377.
Watson, S., 341.
Wave theory. See Undulatory theory.
Weber, H. H., 355.
Weigel, 219.
Weiler, 341.
Werner, 153.
Wertheim, 390.
Westergaard, 340.
Wheatstone, 386.
Whiston, 216.
Whitney, 87.
Widmann, 150.
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