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A Treatise on Electricity and Magnetism

英语 BooksWhale 版本 · James Clerk Maxwell

A landmark scientific treatise on electricity, magnetism, fields, mathematics, and physical theory.

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A Treatise on Electricity and Magnetism

A Treatise on Electricity and Magnetism is James Clerk Maxwell’s foundational work unifying electrical and magnetic phenomena through mathematical theory. This English edition presents the public-domain text for focused study.

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James Clerk Maxwell died in 1879, and A Treatise on Electricity and Magnetism was first published in 1873. These dates support the public-domain basis for the English source text used in this edition.

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A Treatise on Electricity and Magnetism

James Clerk Maxwell

预览章节Preface预览

The fact that certain bodies, after being rubbed, appear to attract other bodies, was known to the ancients. In modern times, a great variety of other phenomena have been observed, and have been found to be related to these phenomena of attraction. They have been classed under the name of Electric phenomena, amber, ἤλεκτρον , having been the substance in which they were first described.

Other bodies, particularly the loadstone, and pieces of iron and steel which have been subjected to certain processes, have also been long known to exhibit phenomena of action at a distance. These phenomena, with others related to them, were found to differ from the electric phenomena, and have been classed under the name of Magnetic phenomena, the loadstone, μάγνης , being found in the Thessalian Magnesia.

These two classes of phenomena have since been found to be related to each other, and the relations between the various phenomena of both classes, so far as they are known, constitute the science of Electromagnetism.

In the following Treatise I propose to describe the most important of these phenomena, to shew how they may be subjected to measurement, and to trace the mathematical connexions of the quantities measured. Having thus obtained the data for a mathematical theory of electromagnetism, and having shewn how this theory may be applied to the calculation of phenomena, I shall endeavour to place in as clear a light as I can the relations between the mathematical form of this theory and that of the fundamental science of Dynamics, in order that we may be in some degree prepared to determine the kind of dynamical phenomena among which we are to look for illustrations or explanations of the electromagnetic phenomena.

In describing the phenomena, I shall select those which most clearly illustrate the fundamental ideas of the theory, omitting others, or reserving them till the reader is more advanced.

The most important aspect of any phenomenon from a mathematical point of view is that of a measurable quantity. I shall therefore consider electrical phenomena chiefly with a view to their measurement, describing the methods of measurement, and defining the standards on which they depend.

In the application of mathematics to the calculation of electrical quantities, I shall endeavour in the first place to deduce the most general conclusions from the data at our disposal, and in the next place to apply the results to the simplest cases that can be chosen. I shall avoid, as much as I can, those questions which, though they have elicited the skill of mathematicians, have not enlarged our knowledge of science.

The internal relations of the different branches of the science which we have to study are more numerous and complex than those of any other science hitherto developed. Its external relations, on the one hand to dynamics, and on the other to heat, light, chemical action, and the constitution of bodies, seem to indicate the special importance of electrical science as an aid to the interpretation of nature.

It appears to me, therefore, that the study of electromagnetism in all its extent has now become of the first importance as a means of promoting the progress of science.

The mathematical laws of the different classes of phenomena have been to a great extent satisfactorily made out.

The connexions between the different classes of phenomena have also been investigated, and the probability of the rigorous exactness of the experimental laws has been greatly strengthened by a more extended knowledge of their relations to each other.

Finally, some progress has been made in the reduction of electromagnetism to a dynamical science, by shewing that no electromagnetic phenomenon is contradictory to the supposition that it depends on purely dynamical action.

What has been hitherto done, however, has by no means exhausted the field of electrical research. It has rather opened up that field, by pointing out subjects of enquiry, and furnishing us with means of investigation.

预览章节Preliminary预览

ON THE MEASUREMENT OF QUANTITIES.

目录

本版本内容

  1. 01Full text
  2. 02Preface
  3. 03Preliminary
  4. 041.]
  5. 0519.]
  6. 0620.]
  7. 0724.]
  8. 08Part Iii
  9. 09Chapter I
  10. 10371.]
  11. 11Chapter Ii
  12. 12395.]
  13. 13398.]
  14. 14399.]
  15. 15Chapter Iii
  16. 16407.]
  17. 17Chapter Iv
  18. 18424.]
  19. 19Part Iv
  20. 20Chapter Vi
  21. 21Chapter Vi
  22. 22Chapter Vi
  23. 23Chapter V
  24. 24431.]
  25. 25Chapter Vi
  26. 26442.]
  27. 27448.]
  28. 28Chapter Vii
  29. 29449.]
  30. 30Chapter Viii
  31. 31465.]
  32. 32Part Iv
  33. 33Chapter I
  34. 34475.]
  35. 35499.]
  36. 36Chapter Ii
  37. 37502.]
  38. 38Chapter Iii
  39. 39528.]
  40. 40530.]
  41. 41Chapter Iv
  42. 42546.]
  43. 43Chapter V
  44. 44553.]
  45. 45Chapter Vi
  46. 46568.]
  47. 47Chapter Vii
  48. 48Chapter Viii
  49. 49Chapter Vii
  50. 50Chapter Ix
  51. 51604.]
  52. 52Chapter X
  53. 53620.]
  54. 54626.]
  55. 55Chapter Xi
  56. 56630.]
  57. 57Chapter Xii
  58. 58668.]
  59. 59Chapter Xiii
  60. 60682.]
  61. 61692.]
  62. 62Chapter Xiv
  63. 63694.]
  64. 64Chapter Xv
  65. 65707.]
  66. 66713.]
  67. 67Chapter Xvi
  68. 68Chapter Xvii
  69. 69752.]
  70. 70753.]
  71. 71754.]
  72. 72Chapter Xviii
  73. 73758.]
  74. 74Chapter Xix
  75. 75768.]
  76. 76Chapter Xx
  77. 77781.]
  78. 78Chapter Xxi
  79. 79806.]
  80. 80Chapter Xxii
  81. 81Chapter Xxiii
  82. 82Index
  83. 83Index
  84. 84Part I
  85. 85Chapter I
  86. 8627.]
  87. 8728.]
  88. 8830.]
  89. 8931.]
  90. 9032.]
  91. 91Chapter Ii
  92. 9280.]
  93. 93Chapter Iii
  94. 9488.]
  95. 9589.]
  96. 9690.]
  97. 9791.]
  98. 98Chapter Iv
  99. 9995.]
  100. 10097.]
  101. 101101.]
  102. 102Chapter V
  103. 103Chapter Vi
  104. 104112.]
  105. 105Chapter Vii
  106. 106117.]
  107. 107Chapter Viii
  108. 108Chapter Ix
  109. 109Chapter X
  110. 110152.]
  111. 111Chapter Xi
  112. 112157.]
  113. 113Chapter Xii
  114. 114182.]
  115. 115Chapter Xiii
  116. 116221.]
  117. 117Preliminary
  118. 1181.]
  119. 11919.]
  120. 12020.]
  121. 12124.]
  122. 122Part I
  123. 123Chapter I
  124. 12427.]
  125. 12528.]
  126. 12630.]
  127. 12731.]
  128. 12832.]
  129. 129Part I
  130. 130Chapter I
  131. 13127.]
  132. 13228.]
  133. 13330.]
  134. 13431.]
  135. 13532.]
  136. 136Chapter Ii
  137. 13780.]
  138. 138Chapter Iii
  139. 13988.]
  140. 14089.]
  141. 14190.]
  142. 14291.]
  143. 143Chapter Iv
  144. 14495.]
  145. 14597.]
  146. 146101.]
  147. 147Chapter V
  148. 148Chapter Vi
  149. 149112.]
  150. 150Chapter Vii
  151. 151117.]
  152. 152Chapter Viii
  153. 153Chapter Ix
  154. 154Chapter X
  155. 155152.]
  156. 156Chapter Xi
  157. 157157.]
  158. 158Chapter Xii
  159. 159182.]
  160. 160Chapter Xiii
  161. 161221.]

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