INDEX 



327 



subjective reality, 60 

 substitution method, 28 

 supersaturated vapor, 228 

 surface tension, 221 

 symbolized logic, 115 

 sympathetic vibrations, 300 

 Syracuse, 44 



talent, 12 



tangential energy, 196 



terrella, 47 



Thales, 13, 34 



theory, 34, 45 



thermionic emission, 185 



thermodynamics, laws of, 114. 



268 



thermometer, 166, 170 

 Thomson, 229, 230 

 thorium, 92 

 time, 32 

 tool, 1, 4 



Torricelli, 54, 137 

 Townsend, 306 

 tractate, 146 

 train of waves, 65 

 transit, 34 



translation, motion of, 7 

 triple point, 241 



ultraviolet, 187 

 ultimate strength, 31 

 United States, 27 



263, 



units, 24, 123. See also electricity, 



units of 



universal gravitation, 141, 142 

 uranium, 92 



vacuum, 54, 90 



valence, 86 



Van't Hoff, 239, 243 



Van der Waals's equation, 222, 224, 



230, 281 



vapor pressure, 225, 239, 240 

 variable mass, 213 

 variable standards, 25 

 velocity, 134 

 Vesuvius, 49 



vibration of elastic system, 66 

 viscosity, 274 

 Vitruvius, 42 

 volt, 178 

 Volta, 86, 175, 197 



Waage, 259 



water, decomposition of, 253 



watt, 145 



wedge, 18 



weighing, 27 



weight, 147 



wheel and axle, 21 



wireless telegraphy, 124 



work, 8. See energy 



work principle, 20, 153 



X-rays, 91, 190 



Printed in the United States of America. 



