INDEX 



451 



Heat Continued 



movement of, 99 



specific, 105 



thermometers, 100-103 



units, 103 



used in measuring work, 339 



water, 3 18 

 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 

 Hemlock, 407 

 Hickory, 394, 410 

 Horse-power, 325, 335 

 Hydraulic press, 71 



use of, 72 

 Hydrocarbons, 158 

 Hydrogen, 132 

 Hydrometer, 82, 91 



Beaume, 83 



Twaddell,83 

 Hygiene, 1, 2 



I 



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 



Jack screw, 46 

 Joints, of boilers, 306 

 Joules, 209, 339 



Kalsomining, 380 



Kilo watt, 2 10 



Kilowatt-hour, 210 



Knife, 



compared with chisel, 425 

 cutting action of, 424 



Larch, 408 

 Latent heat, 104 

 Laws of motion, 54-67 

 Lead 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 



moment of forces, 27 



principle of, 26 



second class, 29 



shapes of, 32 



third class, 30 

 Ley den jar, 184 

 Light, 113-120 



and color, 119 



arc lamp, 117 



characteristics of, 1 13 



Drummond, 117 



gas, 118 



importance of proper, 115 



incandescent lamps, 116 



Nernst lamp, 117 



reflected, 113 



refracted, 114 



standard of, 115 

 Lightning, 186-189 



cause of thunder, 188 



danger from, 187 



forms of, 187 



rod, 188 



Line of direction, 56 

 Linseed oil, 370 

 Liquids, 



capacity of pipes, 73 



hydraulic press, 71 

 use of, 72 



