# Heat, electricity, and magnetism

Allyn and Bacon, 1896 - Physics

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### Contents

 CHAPTER PAGE I Nature of Heat 1 Temperature and its Measurement 9 Expansion 23 Measurement of the Quantity of Heat 42 Fusion 54 Vaporization 65 Transmission of Heat 90 Radiation and Absorption 104
 Atmospheric Electricity 224 Primary Cells 233 Electrolysis 255 Ohms Law and its Applications 273 Thermal Relations 286 Properties of Magnets 305 Magnetic Effects of a Current 334 Electrodynamics 343

 Thermodynamics 126 Kinetic Theory of Gases 142 ELECTRICITY AND MAGNETISM XI Electric Charges 150 Electrification by Influence 171 Electrical Potential 188 Capacity and Condensers 201
 Electromagnetism 352 Electromagnetic Induction 372 Dynamos and Motors 397 Electric Oscillations and Waves 422 APPENDIX 433 INDEX 437

### Popular passages

Page 146 - Avogadro's law states that equal volumes of all gases at the same temperature and pressure contain the same number of molecules...
Page 274 - As a unit of resistance, the international Ohm. which is based upon the ohm equal to 109 units of resistance of the CGS system of electro-magnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice, 14.4521 grammes in mass, of a constant cross-sectional area, and of a length of 106.3 centimetres.
Page 4 - It is hardly necessary to add, that anything which any insulated body, or system of bodies, can continue to furnish without limitation, cannot possibly be a material substance ; and it appears to me to be extremely difficult, if not quite impossible, to form any distinct idea of anything capable of being excited and communicated in the manner the Heat was excited and communicated in these experiments, except it be MOTION.
Page 330 - State a law of relation between the direction of the current and the direction of the lines of force about the conductor.
Page 141 - It is impossible for a self-acting machine, unaided by any external agency, to convey heat from one body to another at a higher temperature ; or heat cannot of itself (that is, without compensation) pass from a colder to a warmer body.
Page 141 - It is impossible by means of inanimate material agency to derive mechanical effect from any portion of matter by cooling it below the temperature of the coldest of the surrounding objects.
Page 126 - When equal quantities of mechanical effect are produced by any means whatever from purely thermal sources, or lost in purely thermal effects, equal quantities of heat are put out of existence or are generated.
Page 259 - II. If the same quantity of electricity passes through different electrolytes, the masses of the different ions deposited will be proportional to the chemical equivalents of the ions. Thus if the same current pass through acidulated water, copper sulphate, and silver nitrate in succession, then for each gramme of hydrogen collected there will be 8 grammes of oxygen, 31 '6 of copper, and 108 of silver.
Page 50 - ... the product of the specific heat by the atomic weight is the same for all the elementary substances.