232 



INDEX 



Chemical, action, 67, 177, 179; 



affinity, 176, 177 ; changes, 108, 



171. 



Chemistry, scope of, 171. 

 Chlorides, 186, 197. 

 Chlorine, 197. 

 Circuit, 143; divided, 145. 

 Cloth, 214. 

 Clouds, 76. 



Coal, 195, 215, 216; tar, 216, 217. 

 Cohesion, 11. 

 Coke, 216. 



Cold, 69; absolute, 86; by vap- 

 orizing, 85 ; by melting, 85. 

 Color, explanation of, 124 ; of 



light waves, 127; of objects, 



127. 

 Combination, chemical, 177, 178, 



180. 

 Combustion, 68, 179, 193, 195, 



221. 



Commutator, 158, 163. 

 Compass, 153, 154. 

 Composition, chemical, 172; of 



matter, 5, 8, 9. 



Compounds, 173, 174, 180, 202. 

 Compressed air, 43 ; engine, 43. 

 Compressibility, 15. 

 Compression, as a source of heat, 



67 ; of gases, 43. 

 Condensation, 75. 

 Condenser, 76. 

 Conduction of heat, 79, 80. 

 Conductors, of electricity, 130, 



134; of heat, 80. 

 Contraction, 72, 73. 

 Convection, 79, 80, 81. 

 Copper, 200. 

 Cotton, 214. 

 Coulomb, 146. 



Crystallization, 16. 



Current, alternating, 158 ; direct, 



158; electric, 140; induced, 155; 



strength, 146 ; uses of, 146. 



Darkness, 112. 

 Decay, 226. 



Decomposition, 172, 178, 227. 

 Dextrose, 207, 227. 

 Diffusion, 6. 

 Dipping needle, 153. 

 Discharge, 137. 

 Disinfection, 229. 

 Distillation, 76. 

 Divided circuit, 145. 

 Ductility, 14. 

 Dynamite, 218. 



Dynamo, 130, 140, 156 ; currents, 

 157, 158; kinds of, 158. 



Ear, 93, 95 ; trumpets, 103. 



Earthenware, 212. 



Echoes, 97, 98. 



Elasticity, 15. 



Electric, cars, 163 ; current, 140 ; 

 discharge, 137 ; lights, 167 ; mo- 

 tors, 162, 163. 



Electrical, effects, 131 ; energy, 

 129, 130, 162; potential, 131, 

 132, 138. 



Electricity, 129 ; charges of, 133, 

 134, 135, 136; generation of, 

 140, 155 ; static, 135. 



Electrolysis, 131. 



Electrolytic effect, 131, 166. 



Electro-magnet, 149, 158. 



Electro-motive force, 132; in- 

 duced, 155; unit of, 146. 



Electroplating, 166. 



Electrostatics, 133, 135. 



