Encyclopædia metropolitana; or, Universal dictionary of knowledge, ed. by E. Smedley, Hugh J. Rose and Henry J. Rose. [With] Plates, 第 4 巻

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目次

9 Cement
9
1828 Illustrative experiments
18
2940 Electrical light
29
41 The spark
41
42 Nairnes machine CONTENTS PART I
42
14 Insulating stool 15 Rods balls c
43
44 Teylers machine
44
45 The electroscope
45
46 Nollets electroscope
46
47 Bennets electroscope
47
48 Cavallos electroscope
48
49 Cavallos pocket electroscope
49
50 Gilberts electroscope
50
5152 Haüys electroscope
51
53 Straw electrometer
53
54 Henleys quadrant electrometer
54
55 Robinsons comparable electrometer
55
5657 Coulombs torsion electrometer
56
70 Electricity resides upon the surface of bodies
70
71 Practical illustration
71
72 Coulombs proof
72
73 Intensity diminished by increased surface
73
74 Fluid is in reality within the excited body
74
75 Changes of intensity upon irregular bodies
75
76 Cases of electrical distribution II On the gradual dissipation of electricity
76
77 Distribution upon a sphere and
77
7881 Experiments dependant upon dissipation CHAP III On the spontaneous motions of the electric fluid
78
8284 Electrical induction and explanations
82
85 At a given distance the attractive and repulsive forces equal
85
86 General laws of electrical action
86
87 Hypotheses of Du Fay and Symmer
87
8891 Hypothesis of Franklin and experiments con nected with
88
92 Reasons opposed to Franklins theory
92
93 Application of the principles of induction
93
94 Functions of the conductor and its points
94
95 Theory applied to Haüys electroscope
95
96 Electrical atmospheres
96
97 Arrangement of fluid as influenced by induction
97
112 Nicholsons spinning condenser
112
113114 Robinsons observations
115
118 General result of Sir H Davys experiments on this
118
124 Inconveniences attending the pile of Volta
124
129 Thickness of glass for jars
129
130 Cavallos selfcharging
130
131 Coated plates
131
132133 Electrical battery
132
134 Effect of moisture within a
134
135 Lateral explosion
135
136137 Capacity for charge in a battery
136
138 Jointed discharger
138
139 On measuring charges of jars
140
141 Henleys universal discharger
141
142 Cuthbertsons discharging electrometer
142
143158 Mechanical effects illustrated by experiments
143
159160 Effects upon vegetable life
159
161163 General effects upon animal life
161
164165 Medical electricity
164
166176 Chemical effects of electricity
166
173 Law of its action in different metals deduced by Volta
173
177178 Effects of electricity connected with light
177
178 Influence of the conducting power of the fluid part 212
179
179183 Evolution of heat by electricity 184185 Effects of electricity upon magnetic bodies CHAP VII On the various sources of electrical excitatio...
184
186 Introduction
186
187189 Effects of friction upon different substances
187
190 On the use of amalgam
190
195 The Electricity from Chemical action is of an opposite
195
99
197
119
200
201 The two theories contrasted
201
208 No current visible in the fluid
208
THEORIES OF GALVANISM
340
152 Proofs of the identity of Galvanism and Electricity
372
CHEMISTRY
591
153 Circumstances in which they differ
772
157 Modifications of Electric power with respect to quan
793
221
821

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323 ページ - It seems possible to account for all the phenomena of heat, if it be supposed that in solids the particles are in a constant state of vibratory motion, the particles of the hottest bodies moving with the greatest velocity...
323 ページ - ... substances the particles move round their own axes, and separate from each other, penetrating in right lines through space. Temperature may be conceived to depend upon the velocities of the vibrations; increase of capacity on the motion being performed in greater space ; and the diminution of temperature during the conversion of solids into fluids or gases, may be explained on the idea of the loss of vibratory motion, in consequence of the revolution of particles round their axes, at the moment...
322 ページ - The immediate cause of the phenomenon of heat, then, is motion ; and the laws of its communication are precisely the same as the laws of the communication of motion.
195 ページ - I coated several wires in the same manner, and found that when sparks from the conductors before mentioned were made to pass through water by means of a point so guarded, a spark passing to the distance of one-eighth of an inch would decompose water, when the point exposed did not exceed T1§w of an inch in diameter. With another point...
331 ページ - The vessels in which the freezing mixture is made should be very thin, and just large enough to hold it, and the materials should be mixed together as quickly as possible.
193 ページ - Under these circumstances, a vivid action was soon observed to take place. The potash began to fuse at both its points of electrization. There was a violent effervescence at the upper surface : at the lower or negative surface, there was no liberation of elastic fluid; but small globules, having a high metallic lustre, and being precisely similar, in visible characters to quicksilver, appeared ; some of which burnt with explosion, and bright flame, as soon as they were formed, and others remained,...
176 ページ - ... the distance at which the discharge took place increased as the exhaustion was made, and when the atmosphere in the vessel supported only one-fourth of an inch of mercury in the barometrical...
45 ページ - Chance has thrown in my way another Principle, more universal and remarkable . . . and which casts a new Light on the Subject of Electricity. This Principle is, that there are two distinct Electricities, very different from one another; one of which I call vitreous Electricity and the other resinous Electricity.
125 ページ - THE electric organs of the torpedo are placed on each side of the cranium and gills, reaching from thence to the semicircular cartilages of each great fin, and extending longitudinally from the anterior extremity of the animal to the transverse cartilage, which divides the thorax from the abdomen...
424 ページ - The colours thus communicated by the different bases to flame afford, in many cases, a ready and neat way of detecting extremely minute Quantities of them...

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