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xviii
TABLE OF CONTENTS.
NO. OF
PARAGRAPH.
190 Dalton's Law of the Pressure of Vapours
191 Limit of Evaporation.
192 Circumstances which influence Evaporation
193 Dew Point
194 Daniell's Hygrometer
195 Wet Bulb Hygrometer
196 Liquefaction and Solidification of Gases
197 Pressure exerted by Condensed Gases
198 Spheroidal State produced by Heat
IV. Atomic Relations of Heat evolved in
Chemical Combination
421-443
199 The Quantity of Heat developed in Chemical Action is definite 421
200 Early Experiments
423
204 Influence of Dimorphism
205 Heat Evolved during Decomposition
206 Combustion of Compounds.
207 Indirect Methods of Estimating Calorific Equivalents
208 Mercurial Calorimeter of Favre and Silbermann
208a Bunsen's Calorimeter
209 Heat Evolved during Metallic Precipitation
210 Calorific Equivalents of Elements .
211 Heat Evolved during the Reaction of Acids and Bases
xix
*NO. OF
219 Measurement of the Magnetic Intensity of a Bar
220 Magnetism of the Earth :-The Dip.
221 Declination or Variation
222 Variation in the Intensity of the Earth's Magnetism.
§ II. Static Electricity
223 Simple Facts connected with Electricity.
224 Two Kinds of Electricity
245 Other Sources of Electricity-Heat-Fracture
246 Electricity from Chemical Action.
247 Electricity of Vapour
248 Atmospheric Electricity-Lightning Rods
249 Aurora Borealis
§ III. Galvanic or Voltaic Electricity 505-611
464
466
467
470
472
473
474
475
477
481
483
485
ib.
486
488
490
491
494
495
497
499
504
XX
252 Activity of the Conducting Wire.
253 Action of the Conducting Wire on a Magnetic Needle.
254 The Galvanometer
255 Summary of the Effects produced by the Conducting Wire
256 The Voltaic Pile: the Crown of Cups
257 Electric Disturbance produced by Contact
517
258 Necessity of Chemical Action to produce Voltaic Action
259 Polarization and Transfer of the Elements of the Liquid
260 Energy of the Current proportionate to the Chemical Activity 520
261 Direction of the Current-Electro-Chemical Order of the Ele- ments: Protection of Ship's Sheathing .
262 Circuits with One Metal and Two Liquids.
263 General Summary
522
527
529
264 Counteracting Currents :-Grove's Gas Battery
265 Daniell's Battery
266 Grove's Nitric Acid Battery-Bunsen's Coke Battery
267 Smee's Battery
268 Resistances to the Voltaic Current
269 Differences between a Simple and a Compound Circuit .
270 Ohm's Theory.
272 The Voltameter
545
280 Disruptive Discharge :-Electric Light.
281 Discharge by Convection :-Chemical Actions
282 Laws of Electrolysis.
283 Relative Decomposability of Electrolytes
284 Electro-chemical Actions
285 Electrolysis of Salts.
286 Bearing of Electrolysis on the Theory of Salts
287 Unequal Transfer of Ions during Electrolysis.
288 Electrovection or Electrical Endosmose .
291 Theory of the Electrical Origin of Chemical Attraction
292 Electrotype or Voltatype Processes
293 Preparation of Moulds for Electrotyping
294 Electro-zincing, &c.
297 Resemblances between Static and Voltaic Electricity 298 Deluc's Dry Pile-Zamboni's Pile
299 Water Battery.
IV. Electro-Magnetism
PAGE
590
593
300 Law of Electro-Magnetic Action
301 Tangent Galvanometer
302 Influence of a Conducting Wire in Exciting Magnetism
303 Formation of Electro-Magnets
304 Molecular Movements during the Magnetization of Bars
305 Laws of Electro-Magnetism
306 Ampère's Theory of Electro-Magnetism
307 Mutual Influence of Wires which are conveying Currents.
308 Electro-Magnetic Rotations.
309 Electric Telegraph
§ V. Magneto-Electricity
310 Volta-Electric Induction
632-656
632
311 Magneto-Electric Induction
633
312 Ruhmkorff's Magneto-Electric Induction Coil-Stratified Elec-
tric Discharge.
635
313 Inductive Action of Currents :-Henry's Coils
314 Arago's Rotations.
315 Magneto-Electric Machines.
315a Absolute Measures of Electro-Magnetic Quantities.
319 Electrical Phenomena exhibited by the Torpedo
320 Electrical Phenomena of the Gymnotus
321 The Muscular Current in Living Animals .
664
.665-682
665
668
669
670
672
673
674
.
676
678
327 Influence of Chemical Composition upon the Magnetic or Dia-
magnetic State . .
328 Influence of Structure on Diamagnetism
329 Law of Diamagnetic Repulsion
330 Mutual Relations of Different kinds of Energy
Formulæ for Reduction of English to Metrical, and Metrical to
English Weights and Measures
683
684
685
Metrical Equivalents to English Measures of Length and Capacity 686
Metrical Equivalents to English Weights
Comparison of Centigrade and Fahrenheit Thermometers
Pressure of Aqueous Vapour