On Monday, March 11, 2019 04:42:02 PM you wrote:

> Re Claudio’s FB reference on measurements of atmospheric electric

> fielddaily, seasonally and over years: Listedbelow, see some references

> I’m using to get acquainted with this area ofcommunications. If any of us

> havefurther useful references, I’d enjoy learning about them.

HI Jim, TNX for Feynman URL.

If you are interested also in the history of Conduction of electricity through gases I suggest this book:

Thomson, J. J. (Joseph John), Sir, 1856-1940

"Conduction of electricity through gases"

https://archive.org/details/conductionofele00thomuoft/page/n6

73, Claudio IK2PII

> http://www.feynmanlectures.caltech.edu/II_09.html Feynman lectures intro

> https://en.wikipedia.org/wiki/Atmospheric_electricity Wiki includes

> 18th-19thcentury work http://pat2pdf.org/patents/pat0129971.pdf (1872)

> Loomis electric circuit idea oftelegraph without wires

> http://pat2pdf.org/patents/pat1014719.pdf (1912) Apparatus for Collecting

> ElectricalEnergy. W. Pennock

> https://www.chegg.com/homework-help/questions-and-answers/resistance-atmosp

> here-conductivity-earth-s-atmosphere-increases-height-due-ionization-sola-q3

> 5218415 Formula for atmospheric conductivity

> https://encyclopedia2.thefreedictionary.com/Atmospheric+Conductivity air

> conductivity GL, Stefan, with your experiment in progress! 73, Jim H

> W5EST

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