[LM111179], Letter from Arthur Edwin Kennelly to James Gordon MacGregor, November 30th, 1888


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[LM111179], Letter from Arthur Edwin Kennelly to James Gordon MacGregor, November 30th, 1888

Editor's Notes

Private 30th November 8##Dear Sir##I beg to offer you my best thanks for your kind letter of the 25th inst and the copy of the paper accompanying it. I think that from the data you mention we may safely place the superior limit of your current strengths traversing the electrolytic all at 0.06 milliamperes.##I regret to say that I am not familiar with [Gore's?] work in this matter although I have noticed some of his papers on electrolysis. I shall therefore take the first opportunity of referring to the journals you mention.##I may mention entre nous that we have lately checked closely some results by McEwing and yourself published in Jenkin's Elect, & Magnetism,--in a very interesting manner. The sp--- resst of ---- solutions of various densities are there stated for the one temp. of 10 [degree symbol] C. We have had occasion lately to ascertain the temp. coeff: of these solutions and we find beyond a doubt that with the exception of the most dense solutions where density itself as a variable at different temperature seem to play some part, this -----ness of any solution can be, ----- --- ###forrmula - = a + bt + ct [squared] where a b & c are constants while d is the temps in --C. Further too taking any solution as a standard any other solution can be expressed as a direct factor of each sufficient##-- = h (a + bt + ct [squared])##In other words the temp curves are parabolas the corresponding coordinates of which bear constant ratios. Working back all these observations to a this theoretical [specimens?] at 0 [degree symbol] C and then constructing the curve of 10 [degree symbol] C the results coincide with yours converted from -- - to legal ohms and do not diverge for at each end of the curve.##I think that is most interesting, but as I have not yet obtained Mr Edison's permission to publish it I can only state the matter to you between ourselves just now.##With many thanks for your kindness and in readiness to render you any scientific assistance I can that my duties permit.##Believe me to remain##Yours very truly##A.E. Kennelly




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Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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