472 



INDEX 



Fahrenheit thermometer, 102 

 Fastening agents, 249-261 



bolts, 252-258 



nails, 249 



screws, 249-251 

 Faucet, 462 

 Files, 266-270 



kinds of, 266 



methods of using, 269 



shape of, 268 



teeth of, 267 

 Filtration, 143, 145 

 Fire extinguisher, chemical, 165 

 Fire, starting a, 342 

 Flame, 158 

 Flange-couplings, 285 

 Flexure, 234, 235 

 Flues, 322 

 Foot-pound, 24 

 Force, 23 



bending, 237 



centrifugal, 59-61 



centripetal, 60 



effects of load of, on body, 233 



electro-magnetic, 170 



parallelogram of, 62 

 Forced fits, 398 

 Friction, 



ball bearings, 50 



effect of 49 



measurement of, 50 

 Frictional electricity (See "Elec- 

 tricity, frictional ") 

 Fuse, 201 



Galvanometer, 178 



used in measuring heat, 182 

 Gas, 



engines, 359-368 (See also "Gas 

 engines") 



for heating, 347 



lighting, 118 



manufactured, 118 



natural, 118 

 Gas engines, 359-368 



operation of, 361 



principles of, 359 



types of, 360 



Gases, 



air, properties of, 90 



barometer, 88 



Boyle's Law, 93 



expansion of, 87 



noxious, 356 



properties of, 86-98 



use in industry, 86 

 Gassing, 164 

 Gauges, 



screw pitch, 438 



thickness, 437 



water, 3 13 

 Gear-box, 366 

 Gears, 291-300 



direction of, 296 



object of, 291 



parts identified, 297-299 



principle of, 291-293 



ratio of, 296 



ratio of measurements, 299 



relation of speed to diameter, 

 295 



teeth of, 294 



terms defined, 297-299 



types of, 293 



Generation of steam (See"Steam") 

 Geology, 1, 2 

 German silver, 452 

 Glass, 159 

 Governor, 330, 365 

 Gravitation, 55 

 Gravity, 



acceleration of, 56 



cell, 175 



specific, 80 



Grinding machine, 435 

 Grinding stones, 278-281 



artificial development of, 280 



corundum wheels, 279 



development of, 278 



emery wheels, 279 

 Gun-metal, 454 

 Gunpowder, 159 



Hammers, 262 

 power, 436 

 steam, 397 

 water, 463 



