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Electrical Conduction and Breakdown in Liquid Dielectrics

Electrical Conduction and Breakdown in Liquid Dielectrics Corrigendum 815 These instruments had open, not telescopic, sights, but Kepler estimated that Tycho’s error in angle did not exceed two minutes of arc: such was his confidence in this precision that a discrepancy of eight minutes between Tycho’s observation and a calculation of the orbit of Mars which he, Kepler, had carried on an early scheme of his was sufficient to lead him to abandon this scheme and turn to work that culminated in the discovery of the elliptic orbit. Professor Ramsauer is, perhaps, a little over-kind to Kepler’s notions on the mechanics of the heavens-Kepler’s ’ magnetic ’ force had no resemblance to a gravitational force, for he said quite plainly non est attractoria sed promotoria-but he rightly stresses his immense services. Exceeding the limiting date at the other end is the account of Lebedew’s experiments on the pressure of light, no doubt included as clinching Maxwell’s theory of light and because the experimental elegance strongly appealed to the author. To give some notion of the scope of the book, the other experiments on light which are to be found here are those of Romer (perhaps hardly experi- mental), Fizeau and Foucault on the velocity of light, Newton’s work on the decomposition of white light, Fresnel on interference, Malus on polarization and the chief optical work of Fraunhofer, Kirchhoff and Bunsen. The account of the experimental proofs of the kinetic theory of gases, dealing with the work of Robert Brown (‘ Brownian-movement Brown’), 0. E. Meyer and Maxwell, is com- pleted by a short description of the experiments which Stern carried out in 1920. The careful discussion of the early experiments on the gas laws, going up to Regnault, disposes of Mariotte’s claim to be included with Boyle. We are glad to see Andrews’ fundamental experiments on the critical point included in the work oil gases. The experiments on electricity and magnetism comprise, besides those that would at once occur to the reader, Rowland’s work on the magnetic effect of a moving charge, a difficult and fundamental achievement. The book concludes with an account of Feddersen’s investigations of the oscill- atory discharge, a fascinating piece of work, and Hertz’s discovery of electric waves, of which the author says that since Faraday’s discovery of electromagnetic induction there has been no experimental discovery of such genius. This book is written with a lifetime’s knowledge of experimental physics and with an unabated enthusiasm for ingenuity of experimental method. It should meet with a warm welcome, not least wherever physics is taught. We look forward to a second volume which is announced, to cover the period from E. N. DA C. ANDRADE. Rontgen rays to wave mechanics. ~~ CORRIGENDUM Electrzcal Conduction and Breakdown in Liquid Dielectrics, by D. w. GOODWIN and K. A. MACFADYEN (Proc. Phys. Soc. B,. 1953, 66, 85). The authors of the above paper state : “ The dielectric constant of the liquid was unfortunately omitted from the analysis in g 5. It should appear as a multiplied factor on the left of eqn. (7) and throughout the subsequent equations. It should have been stated ln 5 2 that the field strength is assumed for simplicity to be modified by space-charge to Only a small extent. In fig. 8 the labels should read 0, 100, 200, 300~. Equation (14) should read F=bC8/(2,/C,-1) instead of as shown, and the subsequent sentence should be deleted. These changes modify Curve a In fig. 11, but, as is explained in 5 5.3, the agreement is in any case partly fortuitous. We regret these errors and apologize for any inconvenience caused to readers.” http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Proceedings of the Physical Society Section B IOP Publishing

Electrical Conduction and Breakdown in Liquid Dielectrics

Proceedings of the Physical Society Section B , Volume 66 (9) – Sep 1, 1953
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Copyright
Copyright © IOP Publishing Ltd
ISSN
0370-1301
DOI
10.1088/0370-1301/66/9/513
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Abstract

Corrigendum 815 These instruments had open, not telescopic, sights, but Kepler estimated that Tycho’s error in angle did not exceed two minutes of arc: such was his confidence in this precision that a discrepancy of eight minutes between Tycho’s observation and a calculation of the orbit of Mars which he, Kepler, had carried on an early scheme of his was sufficient to lead him to abandon this scheme and turn to work that culminated in the discovery of the elliptic orbit. Professor Ramsauer is, perhaps, a little over-kind to Kepler’s notions on the mechanics of the heavens-Kepler’s ’ magnetic ’ force had no resemblance to a gravitational force, for he said quite plainly non est attractoria sed promotoria-but he rightly stresses his immense services. Exceeding the limiting date at the other end is the account of Lebedew’s experiments on the pressure of light, no doubt included as clinching Maxwell’s theory of light and because the experimental elegance strongly appealed to the author. To give some notion of the scope of the book, the other experiments on light which are to be found here are those of Romer (perhaps hardly experi- mental), Fizeau and Foucault on the velocity of light, Newton’s work on the decomposition of white light, Fresnel on interference, Malus on polarization and the chief optical work of Fraunhofer, Kirchhoff and Bunsen. The account of the experimental proofs of the kinetic theory of gases, dealing with the work of Robert Brown (‘ Brownian-movement Brown’), 0. E. Meyer and Maxwell, is com- pleted by a short description of the experiments which Stern carried out in 1920. The careful discussion of the early experiments on the gas laws, going up to Regnault, disposes of Mariotte’s claim to be included with Boyle. We are glad to see Andrews’ fundamental experiments on the critical point included in the work oil gases. The experiments on electricity and magnetism comprise, besides those that would at once occur to the reader, Rowland’s work on the magnetic effect of a moving charge, a difficult and fundamental achievement. The book concludes with an account of Feddersen’s investigations of the oscill- atory discharge, a fascinating piece of work, and Hertz’s discovery of electric waves, of which the author says that since Faraday’s discovery of electromagnetic induction there has been no experimental discovery of such genius. This book is written with a lifetime’s knowledge of experimental physics and with an unabated enthusiasm for ingenuity of experimental method. It should meet with a warm welcome, not least wherever physics is taught. We look forward to a second volume which is announced, to cover the period from E. N. DA C. ANDRADE. Rontgen rays to wave mechanics. ~~ CORRIGENDUM Electrzcal Conduction and Breakdown in Liquid Dielectrics, by D. w. GOODWIN and K. A. MACFADYEN (Proc. Phys. Soc. B,. 1953, 66, 85). The authors of the above paper state : “ The dielectric constant of the liquid was unfortunately omitted from the analysis in g 5. It should appear as a multiplied factor on the left of eqn. (7) and throughout the subsequent equations. It should have been stated ln 5 2 that the field strength is assumed for simplicity to be modified by space-charge to Only a small extent. In fig. 8 the labels should read 0, 100, 200, 300~. Equation (14) should read F=bC8/(2,/C,-1) instead of as shown, and the subsequent sentence should be deleted. These changes modify Curve a In fig. 11, but, as is explained in 5 5.3, the agreement is in any case partly fortuitous. We regret these errors and apologize for any inconvenience caused to readers.”

Journal

Proceedings of the Physical Society Section B – IOP Publishing

Published: Sep 1, 1953

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