INDEX 



471 



D' Arson val galvanometer, 178 

 Density, 10 



defined, 11 



Direct connected dynamo, 195 

 Distance, measurement of, 8 

 Distillation, 143, 148 

 Drag, 376 



Drawing paper, 227 

 Drilling machine, 429, 433 

 Drills, 428 



construction of, 272 



kinds of, 271 



methods of using, 272 



points of, 272-274 



tap, 258-260 

 Drop forging, 397 

 Drummond light, 117 

 Dry cells, 175 

 Ductility, 3 



table of, 5 

 Durability, 4 

 Dust, 357 

 Dyeing, 162 

 Dyestuffs, 162 

 Dynamo, 190 



action of, 193 



alternating, 195 



care of, 196 



compound machine, 195 



direct, 195 



direct connected machine, 195 



efficiency of, 200 



principle of, 190 



series machine, 194 



shunt machine, 194 



types of, 194-196 



Earth, composition of, 150-152 



Earthenware, 160 



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 

 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 



