Royal Society, Received 3-Dec.1901 <u>Confidential <\u> Referee’s Report To the Sectional Committee for Physics and Chemistry Paper by Mrs H. Ayrton On the Mechanism of the Electric Arc. 1. Whether the paper should or should not be published in “Philosophical Transactions “ <u>The paper should be so published .<\u> 2. Whether it should be published in full or in part only. <u>In full <\u> 3. Whether any modifications are necessary or desirable and if so of what nature. <u>No modifications seem necessary.<\u> 4. What illustrations (if any) accompanying the paper should be reproduced. <u>The illustrations are not excessive and should I think all be given.<\u> The paper seems to me a very suggestive one, and to throw much light on the much debated questions of the mechanism of the arc, or rather as I should put it on the physical processes concerned in the production of an electric arc. There is as I have noticed elsewhere some apparent divergence of result as to the existence of a back electromotive force in the arc, between this paper and Mr. Duddell’s on the same subject Mrs Ayrton is of opinion that great heat is developed in a film of great resistance close to the positive carbon, while Mr. Duddell detects an opposing potential difference. It is true that Mr. Duddell as I understand him distinguishes between an opposing <s>E.M.F.<\s> difference of potential and a “back E.M.F.” but I do not understand the distinction. Professor A. Gray.
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Referee report by A. Gray on 'The Mechanism of the Electric Arc' by H. M. Ayrton, 1901. From The Royal Society, RR/15/149
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