322 



Index 



Graduated cylinder, 40; vessels, 

 method of reading, 40 



Graduation of thermometer, 141 



Gram-centimetre, relation to 

 calorie, 201 



Gravesande's ball and ring, 126 



Gravitation,- 44 



Gravity, centre of. 109 



Gravity, universal action of, 

 44 



Grinding glass surfaces, 84 



Heat absorbed during liquefaction, 

 165, 169, 180; solution, 234; 

 vaporisation, 167 



Heat, absorption of, 195; action 

 on gases, 204 



Heat a form of energy, 125, 133, 

 200, 204; a mode of motion, 

 204; and temperature, dis- 

 tinction between, 159; as a 

 quantity, calculations involv- 

 ing, 162 



Heat, change of colour by, 131, 

 state by, 130 ; chemical change 

 produced by, 131 



Heat evolved during combination, 

 218, condensation, 172, solidi- 

 fication, 166 



Heat, expansion by, 125; inter- 

 change of, 148; latent, 166; 

 mechanical equivalent of, 201 



Heat rays, comparison with light 

 rays, 194 



Heat, reflection of, 196 



Hectare, 23 



Hectometre, 3 



Hexagon, area of, 27 



Hofmann's voltameter, 283 



Horse-power, 121 



Hot water system of heating, 188 



Hydraulic press, 87 



Hydrochloric acid, action of heat 

 on, 312; care in handling, 75; 

 for gas preparation, 285 



Hydrogen, action on copper oxide, 

 297, iron oxide, 298; com- 

 bustion in air, 282, 284; con- 

 tained in acids, 313, 315; ex- 

 plosion with oxygen, 291, 300; 

 explosive mixture with air, 

 286, 290; laboratory prepara- 



tion of. 285; lighter than air, 

 282, 286 



Hydrogen peroxide in air, 241 

 Hydrogen, preparation from steam, 

 282, water, 280, 283 ; present in 

 air, 241, foods, 227 ; a product 

 of combustion, 288; tempera- 

 ture of flame of, 288 

 Hydrometer, 92; convenient ranges 

 for, 93 ; method of reading, 93 ; 

 nature of graduation of, 92; 

 testing accuracy of, 94; use 

 of, 93 

 Hygrometer, wet and dry bulb, 



273 



Hygroscopic substances, 234 

 Hypothesis, function of, 76 



Ice and salt as freezing mixture, 

 166, 180; and water, relation 

 between volumes of, 174; con- 

 traction during fusion, 174 



Indestructibility of Energy, 123; 

 of Matter, 230, 231 



Ingenhaus's apparatus, 184 



Invisible ink, 235 



Iron, action of air on, 215; action 

 on steam, 281 ; black oxide of, 

 260, 283; combustion in oxy- 

 gen, 259; reduced, 221 



Irregular figure, area by squared 

 paper, 28; rectilineal figure, 

 area of, 27; solids, volume by 

 displacement of liquids, 40, 41 



Kilogram-metre, 119 



Kilogram, relation to pound, 53, 

 unit of length, 53; standard, 

 53 



Kilometre, 3 



Kilowatt, 121 



Kinetic energy, 123 ; examples of, 

 123; transformation from po- 

 tential, 123 ; transformation 

 into heat, 124 



Kinetic Hypothesis, 77, 191 ; re- 

 capitulation, 202; applied to 

 change of state, 203, expan- 

 sion by heat, 203, pressure 

 changes, 205 



Kipp's generator, 177, 294 



Knife-edges, 51 



