INDEX 



323 



tive, 102; relative, 96, 97; 

 relative, principle of Archi- 

 medes and, 91105 



Densities, relative, determination 

 of, by a U-tube, 100, 101 ; de- 

 termination of, by relative 

 density bottle, 98, 99; Hare's 

 apparatus for determination of, 

 101 ; hydrostatic method of de- 

 termining, 97, 98 ; results of ac- 

 curate determination of , 101,102 



Diamond, the, 285 



Dioxide, carbon, lime and, 288, 

 289 ; occurrence, 291 ; proper- 

 ties of, 290; uses of, 290, 

 291 ; sulphur, formulae for, 

 and sulphuretted hydrogen, 272, 

 273 ; sulphur, properties of, 252 



Disc, the colour, 180 



Dispersion, refraction is accom- 

 panied by 176 



Distance travelled by a body 

 falling from rest, 63 



Distillation, 210 



Divisibility of matter, 3 



Double decomposition, 257 



Drops, liquids can be separated 

 into, 14 



Ductility, solids possess, 10 



EARTH, period of rotation of the, 



35 



Earth's rotation, 34, 35 

 Effects of, heat, 133135; upon 



sulphur, 249 ; refraction, 171 



173 

 Elasticity, of matter, 5, 6 ; solids 



possess, 7 9 

 Electric current, the, 126, 127 ; 



chemical change induced by 



the, 198206 ; passage of an, 



198 205 ; passage of the, 



through liquids, 199 205 ; work 



done by the, 194, 195 

 Electrification, energy of, 125 



127 

 Electrolysis of copper sulphate, 



203, 204 ; sodium sulphate, 204, 



205; water, 200202; terms 



used in describing, 202 

 Elements, chemical, 208 

 Energy, 120 ; conservation of, 128, 



129 ; forms of, 122, 123 ; heat 



as a form of, 123 125 ; kinetic, 

 121, 122 ; measurement of, 122 ; 

 chemical action a form of, 127, 

 128 ; electrification a form of, 

 125127 ; radiant heat and light 

 are forms of, 125 ; potential, 



121, 122 ; transformation of, 

 128 ; work and, 118132 



Equality of masses, 55 

 Equations, chemical, 271, 272 ; 



chemical actions represented by, 



274276 

 Equilibrium, 85 88 ; of three 



parallel forces, conditions for 



the, 77 79 ; stable or unstable, 



87, 88 

 Equivalent weights and valency, 



273 



Ether waves, 160, 161 

 Ethylene, 294 

 Eudiometer, 239, 240 

 Expansion, 134 136 



FAHRENHEIT scale, the, 141 

 Filtration, 211, 212 

 Fire, changes in a coke, 293, 294 

 Flame, oxidising and reducing, 230 

 Flotation, experiments on, 93 95 

 Flow of liquids, 11 

 Fluidity, liquids possess, 7 

 Force, - 58 67 ; acceleration pro- 

 duced by a, 59, 60 ; the moment 

 of a, 49, 50 ; uniform, 62 ; unit 

 of, 59 



Forces, parallel, and centre of 

 gravity, 74 90 ; conditions for 

 the equilibrium of three, 77 

 79 ; principle of, 76 ; resultant 

 of, 76, 77 ; the principle of 

 movements applied to, 79 81 ; 

 parallelogram of, 64, 65 ; resolu- 

 tion of, 66, 67 

 Formation of an image by a plane 



mirror, 166 

 Forms of carbon, 285, 286 ; energy, 



122, 123 



Formula CO^ proof of, 291 ; for 



hydrochloric acid gas, 270, 271 ; 



for water, 271 

 Formulae for sulphur dioxide and 



sulphuretted hydrogen, 272, 273 

 Freezing point, marking the, 139, 



140 



Y 2 



