INDEX. 



Electricity, Current, 13 



Density of, 5, 25 



Effects of, 50 



on magnets, 94 



Frictional, 1 



Induced, 6, 3i 



Intensity of, 25 

 - of muscle, 117 



of nerve, 119 



, Resinous and vitreous, 2 



, Resistance to, 26 



, Tension of, 6, 25 



, Theories of, 3 



, Therapeutical applications 



of, 148 



Electrification by influence, 7 

 Electrodes, 17 



for medical purposes, 157 



, ISTon-polarisable, 112 



, Platinum, 60 



, Polarisation of, 111 



Electrolysis, 50 

 Electrolyte, 52 

 Electro-magnet, 53 

 Electro-magnetism, 168 

 Electromotive force, 17 



of a thermal current, 



143 



of various elements, 24 



to measure by compen- 

 sation, 120 



Electromotor, Capillary, 244 

 Electro-negative, 52 

 Electrophorus, 9 

 Electro-positive, 52 

 Electroscope, Gold-leaf, 7 

 , Pith-ball, 6 



Electrotonus, 77 

 , Effects of, on 



electromotive 



force of a nerve, 126 



, , on excitability 



nerve, 83, 87 

 , Experiments on, 85 



Results of, 86 



Scheme of, 81 



Varieties of, 86 



of a 



Element, Galvanic, Bunsen's, 22 



Chloride of silver, 23 



Constant, 18 



D ameH's, 19 



Gaiffe's, 23 



Gravity, 20 



Grenet's, 22 



Leclanche's, 23 



Marie-Davy's, 23 



Pincus', 23 



Srnee's, 21 

 - Volta's, 16 



Warren de la Eue's, 23 



Elements, Modes of joining, to 

 form battery, 28, 31 



Emission of heat, 461 

 - theory of light, 296 



Emmetropic, 383 



Eudoscope, 355 



Eudosmosis, 252 



, Absorption by, 261 



affected by hydrochloric acid, 



262 



Eiidpsmotic equivalent, 256 



Equilibrium of liquids in com- 

 municating vessels, 193 



, Stable and unstable, 501 



Equivalent of heat, 453 



Erb, 163 



Ether, Cold produced by evapo- 

 ration of, 474 



Evaporation, 474 



Exchanges of gases in lungs, 293 



Excitability of nerve affected by 

 electrotonus, 77 



Ex osmosis, 252 



Expansibility of gas, 270 



Expansion by heat, 464 

 , Coefficient of, 465 



Extra current, 43 



Extraordinary ray, 308 



Eye, Aberrations of, 394 



, Accommodation of, 383, 3^7 . 



as an optical instrument, 374 



, Emmetropic, 383 



, Hypermetropic, 388 



, Myopic, 389 



, Optic axis of, 380 



, Optical constants of, 380 



, Refraction of, 388 



, Visual angle of, 332 



Eye-glass, 358 



Eye-piece, 359 



, Micrometer, 368 



of Hartnack (binocular), 



370 



of Huyghens, 362 



Fahrenheit's therniometric scale, 



468 



Fall hammer, Pflueger's, 68 

 Falliug bodies, Laws of, 503 

 Faraday, discovery of induction 



currents, 34 

 Faradisation, 149 

 , Local and general, of body, 



159 



Favre, 455. 479 



Fick's sprinsr kymographion, 229 

 Field-glass, 359 



Fifth, Interval of, in music, 423 

 Filtration, 266 



