.328 



INDEX 



.Sulphurous acid and sulphites, 



252, 253 

 System, units of mass in the 



British, 44, 45; units of mass 



in the metric, 45 



TEMPERATURE, heat and, dis- 

 tinction between, 142 144 ; 

 measurement of, 136, 137 



Temporary and permanent hard- 

 ness of water, 244, 245, 291, 292 



Tenacity, solids possess, 9, 10 



Terms used in describing electro- 

 lysis, 202 



Thermometer, construction of a } 

 138, 139 ; graduating a, 139 



Thermometers, 137139 



Time, instruments for measuring, 

 35, 36; units of, 35 ; velocity and 

 acceleration, units of, 34 43 



Transformation of energy, 128 



Travels, light, in straight lines, 

 162, 163 



Triangular plate, centre of gravity 

 of a, 84, 85 



Trioxide, sulphur, and sulphuric 

 acid, 253, 254 



UNIFORM, acceleration, measure- 

 ment of, 38, 39 ; force, 62 ; 

 linear velocity, measurement 

 of, 37, 38. 



Unit of acceleration, 39, 40 ; 

 of force, 59 



Units, of area, relation between 

 British and metric, 27 ; of length, 

 area and volume, 21 33 ; 

 relation between British and 

 metric, 23, 24 ; of mass in the 

 British system, 44, 45 ; in the 

 metric system, 45 ; relation 

 between British and metric, 

 45; of time, 35; of time, velocity 

 and acceleration, 34 43 ; 

 of volume, relation between 

 British and metric, 30 



Uses of carbon dioxide, 290, 291 



VALENCY, equivalent weights and, 



273 

 ^Valueof "G," 62 



Vaporisation, latent heat of, 153 

 155 



Varieties of sulphur, 249258 



Velocity, 36 41 ; average, 37 ; 

 acceleration is the rate of 

 change of, 38 ; measurement 

 of uniform linear, 37, 38 ; of a 

 body falling from rest, 63, 64 ; 

 units of, time and acceleration, 

 3443 



Ventilation, 150 



Voltaic cells, construction of sim- 

 ple, 184-197 



Voltameter, 241 



Volume and pressure of a gas, 

 relation between, 112114 ; 

 composition of water by, 240 

 242 ; measurement of, 2832 ; 

 relation between British and 

 metric units of, 30 



Volumes, exercises in the measure- 

 ment of, 29, 30 



WATER, action of sodium upon, 

 234, 235; and the elements 

 composing it, 233247 ; com- 

 position of, by volume, 240 

 242; by weight, 242244; 

 electrolysis of, 200202; for- 

 mula for, 271 ; hardness of, 291, 

 292 ; mineral, 244 ; proportions 

 of oxygen and hydrogen in, 239, 

 240 ; solvent power of hot and 

 cold, 212 



Waters, hard and soft, 244; 

 natural, 244 



Waves, ether, 160, 161 



Weight, of a body, 52 ; of column 

 of atmosphere, 110, 111 ; com- 

 position of water by, 242244 ; 

 constancy of, of gases, 15, 16 ; 

 gain of, during burning, 227, 

 228 ; of the air, 106, 107 



Weights, atomic, 272 ; equivalent, 

 and valency, 273; molecular, 

 273, 274 



White light, recomposition of, 

 179, 180 



Work, 118, 119; and energy, 118 

 132; measurement of, 119, 120 



RICHARD CLAY AND SONS, LIMITED, LONDON AND BUNGAY. 



