474 



INDEX 



Thomson, W., 278, 341, 356, 358, 362 



Three Bodies, Problem of, 331 



Tides, 117, 181 



Time Measurement, 27, 39, 127, 207, 247 



Timocharis, 119 



Torricelli, 253, 256 



Treviranus, 371, 392 



Trigonometry, 115, 122, 128, 133, 163, 



193, 241 



Trisection of Angle, 29, 65, 241 

 Trivium, 148, 174 

 Tycho Brahe, 203-209 

 Tyndall, 311, 382 



Universities, 175, 184, 321 

 Uraniborg, 206 

 Uranus, 333, 342 



Vaccination, 322, 425 

 Vacuum, 247, 257 

 Van t' Hoff , 364 

 Vesalius, 226, 264 

 Vieta, 240 

 Vitruvius, 103, 143 

 Vivisection, 113 

 Vlacq, 245 



Volta, 314 

 Vortices, 278 



Wall, 314 



Wallace, 367, 395 



Wallis, 269, 289 



Water, Composition of, 309, 316 



Watson, 314 



Watt, 312, 320, 441 



Week, 22 



Weismann, 396 



Werner, 317, 386 



Wheeler, 314 



Wohler, 363, 375, 391 



Wren, 288 



Xenocrates, 77 

 Xenophanes, 56 



Year, 21, 38, 120 

 Young, 351 



Zeno, 66 



Zero, 40, 159 



Zoology, 315, 317, 371, 372 



Zymology, 378 



Printed in the United Statea of America. 



