386 



SUBJECT INDEX 



Dialogues of Galileo, 28, 35 

 Diamagnetism, 259, 265 

 Dielectiic constant, 146, 258, 339 

 Differential and integral calculus, 



93, 114 

 Diffraction (Fiaunhofer), 202; 



(Fresnel), 205 

 Digester, Papin's, 119 

 Dioptrics (Kepler), 45 

 Doppler's principle, 88, 331 

 Double stars, spectroscopic, 333 

 Dynamics, 24 

 Dynamo, 255 



Earth, density of, 147; inductor, 

 263; interior of, 334; magnetism 

 of, 154, (Weber's earth in- 

 ductor), 267; orbit of, 14; rota- 

 tion of, i; shape of, 91 



Electric arc, 191; currents, mutual 

 action (Ampere), 228, Kirchoff's 

 laws of, 333; charge, elemen- 

 tai-y, 257, 265; energy, heat 

 equivalent of, 286 ff.; force, law 

 of, 146, 149 ff.; oscillations, 295, 

 299, 360 f.; waves, 359 ff., sta- 

 tionary, 362 



Electrical, machine, 155; units, 

 determination of 266 ff., Paris 

 Congress on, 268 f. 



Electricity, discovery of, 153; posi- 

 tive and negative, 155; atmo- 

 spheric, 164; conduction of, 155; 

 insulation of, 155 



Electrodynamics (Ampere), 225 



Electrodynamometer, 263, 267 



Electrolysis (Davy and Berzelius), 

 189; (Faraday), 256; Faraday's 

 laws of, 265 



Electrolytes, migration of ions in, 



Electromagnetic units, definition 

 of, 243 



Electromagnetism, Oersted's dis- 

 covery of, 214 ff.; Ampere's rules 

 of, 228 



Electrometer, 164; quadrant, 299 



Electromotive force, 166, 227 



Electrons, 347, 376 



Electrophorus, 156, 164 



Electrostatics, 157 



Elementary electric charge, 367, 379 



Elements, chemical, 176 



Encyclopaedists, 99 



Energy, conservation of, 273 ff.; 



kinetic, increase of mass due to, 



376; weight of, 375 

 Entropy, 297 

 Ether, 80, 97, 197, 208 ff., 259, 



339, . 347 ff-, 363 ff-, 372 f.; 

 physics of, 97, 380 



Falling bodies, laws of, 10, 24, 



74 

 Flame, conduction of electricity 



by, 349 

 Fluorescence, loi, 369 

 Fluorescence, cathode ray, 350 

 Fluxions, method of, 93, 107, 114 

 Force, 86 ff.; concept of, 10, 275 

 Fraunhofer's lines, 199 ff., 327 ff. 

 Friction, laws of, 86, 151; loss of 



energy in, 279 

 Frogs, Galvani's experiments with, 



iS9ff- 



Galvanic battery, 170 



Galvanometer, 170, 227 



Gas, work done by expanding, 278 



Gases, 136 ff.; combination of, by 

 volume, 185 ff.; heating of, by 

 compression, 184; kinetic theory 

 of, 300 f.; law of expansion of, 

 183; liquefaction of, 302, by 

 Faraday, 251; permanent, 306 f.; 

 specific heat of, 302; viscosity of, 

 301 



Geometry, 2 



Geysers, 334 



Glass, Fraunhofer's improvements 

 in, 199 



Glycerine, Scheele's discovery of, 

 142 



Grating, diffraction (Fraunhofer), 

 202 



Gravitation, 83; cause of, 96 



Gravitational constant, 147 



Harmonices Mundi (Kepler), 46 

 Heat engine, theory of, 231 f. 

 Heat, Fourier's theory of, 234 

 Heat, generation of, by friction 



(Davy), 173 

 Heat, mechanical equivalent of, 

 235, 271 ff., 289 ff.; Rumford's 

 experiments with, 171 ff. 



