INDEX 



449 



Dynamo, 190 

 action of, 193 

 alternating, 19.5 

 care of, 196 



compound machine, 195 

 direct, 195 



direct connected machine, 195 

 efficiency of, 200 

 principle of, 190 

 scries machine, 194 

 shunt machine, 194 

 types of, 194-196 



E 



Earth, composition of, 150-152 



Earthenware, 160 



Ebony, 394 



Ebullition, 143 



Ejector, 3 17 



Elasticity, 3, 167-224 



Electrical energy, transmission of, 



204-212 

 Electric cells, 



arranged in parallel, 178 



arranged in series, 177 



battery, 174-178 



bichromate, 175 



Daniell, 175 



dry, 175 



gravity, 175 



Leclanche, 174 



voltaic, 174 

 Electricity, 



and magnetism, 167-183 



electrical apparatus, 205 



frictional, 184-189 

 loss due to, 185 



generated chemically, 171 



generated commercially, 190- 

 203 



injuries possible in working 

 with, 211 



inside wiring, 205 



nature of, 168 



outside wiring, 205 



practical uses of, 204 



requirement of trade, 206 



size of wire, 210 



static, 184-189 

 Electric motor, 197-200 



kinds of, 198 



railway, 199 

 Electric power, 173, 

 Electric transformers, 201 

 Electrolysis, 171 

 Electrolyte, 172 

 Electro-magnetic force, 170 

 Elements, chemical, 127 



metallic, 127 



non-metallic, 127 

 Elm, 409 

 Emery, 



cloth, 276 



wheels, 279 

 E.M.F.,172 

 Energy, 24 



accumulated. 65 



kinds of, 63 



kinetic, 63 



potential, 63 



springs as source of, 64 

 Engines, 



gas, 359-368 



steam, 328-341 

 Erasers, 228 



Evaporation, 110, 143, 144 

 Expansion, 



heat and, 99-112 



of metals, 107 



of various substances, 108 



Fahrenheit thermometer, 102 

 Fastening agents, 249-261 



bolts, 252-258 



nails, 249 



screws, 249-251 

 Files, 266-270 



kinds of, 266 



methods of using, 269 



shape of, 268 

 * teeth of, 267 

 Filling, 378 

 Filtration, 143, 145 

 Fir, 



balsam, 410 



Douglas, 406 



white, 409 



Fire extinguisher, chemical, 165 

 Fire, starting a, 342 

 Flame, 158 

 Flange-couplings, 285 



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