INDEX 



473 



Hand-tools, 262-282 



chisels, 263-266 



drills, 271-274 



files, 266-270 



hammers, 262 



scrapers, 270 

 Heat, 99-1 12 



boiling point, 106 



B. T. U., 103 



generation of, 99 



latent, 104 



movement of, 99 



specific, 105 



thermometers, 100-103 



units, 103 



used in measuring work, 339 



water, 318 

 Heating, 



cause of air circulation, 348 



exhaust steam, 345 



gas, 347 



hot- water, 347 



indirect method, 344 



low pressure steam, 346 



main piping. 350 



methods of, 342-353 



radiators, 349 



steam, 343 



Horse-power, 325, 335 

 Hydraulic press, 71 



use of. 72 

 Hydrocarbons, 158 

 Hydrogen, 132 

 Hydrometer, 82, 91 



Beaume, 83 



Twaddell,83 

 Hygiene, 1, 2 



Ice, manufacture of, 92-93 

 Illuminants, composition of, 114 

 Incandescent lamps, 116 

 Inclined plane. 24, 41-43 



example of, 42 

 India ink, 231 

 Induction, 191 

 Industrial science, 1 

 Inertia, 3 

 Infusibility, 4 



table of, 5 

 Injectors, 314, 317 



Intensity of sound, 122 

 Iron, 369-383 

 cast, 



malleable, 392 



properties of, 381 

 foundry, 373 

 mixing of, 374 

 ores, 370 



pig, properties of, 373 

 refining of, 370 



action of fluxes, 372 

 wrought, 390-399 (See also 



"Wrought iron") 



Jack screw, 46 

 Joints, 466 



of boilers, 306 

 Joules, 209, 339 



Key- way machine, 432 

 Kilo watt, 2 10 

 Kilo watt-hour, 2 10 



Latent heat, 104 

 Lathes, 423-426 



compound, 426 



engine, 424 



kinds of, 423 



sample. 426 



size of, 425 



speed of, 424, 425 



tools used on, 426 



turret, 424 



Laws of motion, 54-67 

 Lead, 446 



alloys, 447 



pencils, 225-227 

 Leclanche cell, 174 

 Length, unit of, 7 

 Leverage, 26-34 

 Levers, 24 



compound, 30 

 problems, 31 



first class, 28, 29 



mechanical advantage, 26 



