[LM111437], Letter from Arthur Edwin Kennelly to Joseph Wetzler, June 23rd, 1889
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Title
[LM111437], Letter from Arthur Edwin Kennelly to Joseph Wetzler, June 23rd, 1889
Editor's Notes
I must apologize on the score of business pressure for having so long delayed an answer to your kind letter of the 18th inst, and I now have much pleasure in giving you the definitions of the terms to which you mention all of which except hysteresis are the production of the fertile brain- of Mr Oliver Heaviside whose scientific [accoutrement?] in the vernacular was so eagerly desired. As his terms seem likely to be permanently adopted, and are really most suitable, I have taken the liberty of adding one or two more to complete the series which would otherwise be imperfect, [and?] such [term?] has definite relation to the rest.####Conductance: Capacity for conducting electricity. Numerically the ratio in absolute measure of the current strength to the total electromotive forces in a circuit of uniform flow. A quantity with the nature of a slowness or reciprocal to a velocity. Practical unit the mho. ####Conducticity: Conductance per unit volume.####[Resistance: Capacity for ooppposing the [illeg] flow of electricity. Numerically in absolute measure the ratio of the total electromotive force to 4 - current strength in a circuit of uniform flow. A quantity with the ----- of -- velocity. Practical unit the ohms 1 ---- Resistance per unit volume, sometimes####- all---- to a specific resistance.####Impedance: Capacity for opposing the variable flow of electricity. Numerically in absolute measure the ratio of the total electrometer force to the current strength at any instant in a circuit of variable flow a quantity with the [nature?] of a velocity and in any circuit always greater than the resistance.####Inductance####Capacity for magnetic induction.####Numerically in absolute measure the member of unit lines of magnetic force linked with a circuit traversed by the unit current strength. Sometimes all---- of the nature of a legnth.####Inductivity####specific capacity for magnetic induction.####The numerical ratio of the induction in a medium to the induction producing it.####Reluctance####Capacity for opposing magnetic induction. Numerically the ratio in absolute measures of the magneto motive force in a magnetic circuit to the total induction therein produced. A quantity with the [mature?] reciprocal of a length. Sometimes described as magnetic resistance.####Reluctancy or [Relativity?]####Reluctance per unit volume. Sometimes described as specific magnetic resistance. A numeric the reciprocal of inductivity.####Permittance Capacity of a disdislectric for assisting [shays or di---?]####electrostatic capcity. Numerically the ratio is absolute measure of this total charge of displacement to -- in electrostatic circuit to the difference of potential producing it. A quantity with the [nature?] of a length####[note: date and volume numbers scribbled at bottom margin]####[page 216]####[------ittivity] The numerical ratio of the permi--- - of a dislectric -- that of air ------ Also known as specific induction capacity.####-lastance.####Capacity of a [dislectric?] for opposing electric charge or displacement. Numerically the ratio in absolute measure of the difference of potential in any electrostatic circuit to the total charge or displacement therein produced. The reciprocal of permittance and a quantity of the inverse nature of a length.####[Elasticity?] 85####---stance per unit [scheme?] of [distinction?]#####[crossed out line]####Hyster---####Molecula friction to magnetic change of stre-- That property of medium in virtue of which work is done in changing the direction or intensity of magnetic force among its ----####[Dividing line]####In case you should doubt the correctness of any of these definitions suspend their sources.####With kind regards####Believe me to remain####Yours very truly####A.E. Kennelly####J. Wetzler Esq####Electrical World.####N.Y.####[dates scribbled on the bottom of the page]####
Author
Recipient
Mentioned
Date
1889-06-23
Type
Subject
Folder/Volume ID
LM111-F
Microfilm ID
109:320
Document ID
LM111437
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University