INDEX 



ALCOHOL, specific inductive capacity, 



Ampere, hypothesis as to constitution of 



magnets, 201 

 Analogous and antilogous pyroelectric 



poles, 149 



Armatures for magnets, 175 

 Artificial magnets, 1 

 Atmospheric electricity, 95 

 Axis of a magnet, 215 



BALL- ENDED magnet > 



Ballistic method of measurement of 



permeability, LTI 

 Belli's machine, 17 

 Bennett's Doubler, 16 

 Biot, experiments with nickel needle, 203 

 Bismuth, von Ettingshausen's experi- 

 ments with, 285 



Boltxmann, experiments in specific in- 

 ductive capacity for pases, 127 

 experiments in specific inductive 



capacity for solids, 122 

 investigations with crystalline sul- 

 phur, 124 



CAPACITY, Measurement of, 96 



of a conductor, 81 

 Centre of a magnet, 215 

 Charge, Measurement of, 30 



Unit of, 28 

 Charged surfaces, pull per unit area, 104 



:iar disc, Intensity due to, 40 

 Clouds and lightning conductors, 14 

 Cobalt and nickel, magnetisation and 

 permeability, 



magnets, 



Coil as a magnet, 181 

 Colloids, Magnetic double refraction of, 



334 



Condenser, potential and capacity, 87 

 Conduction, 3 



Electrification 1 

 Conductor, Capacity of, 81 



Intensity outside surface of, 36 



proof that charge on outside only, 



actors. Distribution of electrifica- 

 tion on, 26 

 Consequent poles, in a magnet, 1 7 1 



841 



Coulomb's direct measurement of forces 



between electrified bodies, 62 

 experiments to establish inverse 

 square law for magnetic field, 208 

 Curie, discovery of piezoelectricity, 153 

 experiments on suscepibility and 



permeability, 286 

 law for paramagnetic bodies, 291 

 Current, Electric, produces equal positive 



and negative, 26 



Cylinder, Intensity due to charged, 41 

 Cylinders, Potential and capacity of two 



co-axial, 83 



Potential and capacity of two 

 parallel, 84 



DECLINATION, 301 



Lines of equal, 315 



Diamagnetic bodies, Induced magnetisa- 

 tion in, 249 

 Diamagnetics, 203 



tend to move to weaker field, 205 

 Dielectric, 50, 99 



Alterations in, when subject to 

 electric strain, 142 



constant of ice, 131 



Quincke's experiments, 138 



Stresses in, 134 

 Dip, or inclination, 304 



or inclination by dip circle, 305 



or inclination by earth inductor, 308 

 Discharge from points, 13 



of electrification, 11 

 Disturbances in magnetic field of earth, 



313 



Dolazalek electrometer, 89 

 Drude's experiments on specific inductive 

 capacity with electric waves, 131 



EARTH as a magnet, 169, 301 



inductor, 308 

 Earth's lines of force, 301 



magnetic field, disturbances in, 313 



magnetic poles, 315 

 Ebonite, Inductive capacity of, 99 

 Electrification by conduction, 25 



by friction, 1, 25 



by heating, 149 



by induction, 5, 26 



Coulomb's test of distribution of, 05 



