INDEX. 





DAVY, Sir Humphry, 222, 223, 



228 



Dead-reckoning, 286, 287 

 Diffraction grating, 107-110,195, 



19.6, 337-342 



Dissipation of energy, 137-141 

 Drop, water, 34, 39-48 



ELASTIC resistance of a gas, 



231, 232, 391 

 mechanical analogue to, 392- 



395 

 Elastic solid, gyrostatic model, 



235-243 

 hydro-kinetic model, 243- 



249 



luminiferous ether, 326-329 

 vortex motion, 249-252 

 Elasticity, a mode of motion, 



142-146, 235-243 

 of a gas, 231-234 

 Electric, conductivity, 126-131 

 measurements, 73-136, 423- 



438 



oscillations, 113-116 

 resistance, 434'438, 443'447 

 units, 73-136 



Electromagnetic inertia, 114-119 

 Electromagnetic measurements, 



43 ! -43 6 



Electrometers, 447-453 

 Electrostatic capacity, 426, 427, 



436, 438-441 

 Electrostatic measurements, 423- 



431 



Cavendish, 425-431 

 Coulomb, 423 

 Robinson, 423 

 Equilibrium of vapour at a curved 



surface of liquid, 64-72 

 Ether, 326-329 



work done by, corresponding 

 to diminution of water sur- 

 face, 15 



Films, soap, 8-10, 166-174 

 Fluorescence, 207-213, 282, 283 

 dynamical model of, 204-207 

 Force, 290-292 



in light vibrations, 325, 



326 

 Fraunhofer's lines, 324 



GASES, change of temperature 



with pressure, 397-400 

 kinetic theory of, 218-234 

 Gauss, 6, 81-83, 431-433 

 Gilbert, I 

 Gravitation, universal-, units of 



mass and force, 92-103 

 Gravity, 59-63 



HAIDINGER'S brushes, 334, 335 

 Hardness, measurement of, 74, 



75 



Hawkesbee, 5 

 Heat, diffusion of, 221 no f e 



effect of, on surface tension, 



52, 53 

 Heat from moon, 320, 321 



radiant, 284, 285, 287-290, 



292-295, 316-319 

 Heaviness of matter, I, 2 

 Huygen's construction for wave- 

 front, 181 



ICELAND spar, 330, 333 

 Inertia, electromagnetic, 114-119 



JENKIN, Prof. Fleeming, 129, 



130 

 Joule's measurement of the ohm, 



133-136 



FARADAY, 431, 434 

 Him, ideal, 16-19 



realisation of, 38-44 



KINETIC theory, of gases, 218- 



234 

 of matter, 218-252 



