456 



INDEX 



Telephone Continued 



making a connection, 214-217 



principles of , 213 



supervising lamps, 217 

 Tenacity, 3 



table of, 5 



Tenon machine, 435 

 Tension, 234, 235 

 Thermometers, 100-103 



Fahrenheit and Centigrade, 

 102 



manufacture of, 100 



temperatures in industry, 101 

 Thread (See "Screw thread") 

 Thunder, 188 

 Time, unit of, 7 

 Tools, 22 

 Torsion, 234, 235 

 Toughness, 3 

 Tracing cloth, 230 

 Tracing paper, 231 

 Transformers, electric, 201 

 Transmission of power, 283-301 

 Trees, 390-395 



annual rings, 392 



characteristics of, 390 



heart-wood of, 390 



sap, 391 



sap-wood of, 390 



size of, 393 



structure and growth, 391 

 Tuberculosis, 357 

 Tupelo, 410 

 Turbine, 



steam, 338 

 action of, 338 



water, 75 



Turning lathe, 434 

 Turpentine, 372 

 Twaddell hydrometer, 83 



Vacuum pan, 106 

 Valence, 131 

 Valves, 



air, 351 



of motor car, 363 



safety, 311 



construction of, 312 



steam, 332, 351 



Varnishes, 369-389 



application of, 379 



composition of, 373 

 Ventilation, 354-358 



dust, 357 



exhaust, 355 



forced ,355 



methods of, 354 



noxious gases, 356 



object of, 354 



perspiration, 356 



tuberculosis, relation to, 357 



waste products, 356 

 Volt, 172 

 Voltaic cell, 174 

 Voltmeter, 179 

 Volume, 



rules for finding, 18 



unit of, 8 



W 



Walnut, 393, 410 

 Water, 



gauge, 3 13 



hard, 135 



heater, 318 



measurement of flowing, 77 



needed to produce 1 cu. ft. of 

 steam, 352 



power wasted, 76 



pressure, 69 



properties of, 135 



soft, 136 



storage of, 73 



typical liquid, 68 



weight of cu. ft. of, 69 

 Water wheels, 



overshot, 74, 75 



Pel ton wheel, 79 



turbine, 75 



undershot, 75 

 Watt, 173 



Watt, James, 24, 328 

 Wedge, 24, 44-45 



application of principle of, 44 

 Weights, 7-21 



atomic, 128 



denned, 10 



law of combined, 131 



metals per cu. in., 242 



