[D8822AAQ], Letter from J H Kuehling to Thomas Alva Edison, April 20th, 1888
https://edisondigital.rutgers.edu/document/D8822AAQ
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Metadata
- Title
- [D8822AAQ], Letter from J H Kuehling to Thomas Alva Edison, April 20th, 1888
- Editor's Notes
- "I have thought some time to write to you about one matter if not too much trouble for you to answer I have put up electric bells the first 17 years have been a mechanic since my boyhood and try + do everything as current for as possible [unclear] I have [unclear] plenty to do. ### My question is in reference to insulation some make it out safer to put up a lightning rod without insulation in my 25 years experience I have had a number of rods struck + no damage as [unclear] as seen some but up before my day that were struck + the [unclear] passed off safety but in four cases close by one a .5 inch surface upper rod + one iron and a galvanized iron cable the other part copper all not insulated and were struck and damaged both the houses + in 2 cases injured the inmates. I follow up all strikes closely + in no case have I found damage where a copper rod was insulated. ### IN one case the Lightning passed all the insulation above the 3rd one from the ground which was gone + went into the house from the rod at that point. I put the rods from 5 to 12 feet in the ground. What is your opinion in reference to insulation is it bent to do as I have done I {rest of letter is written in margins and is unclear] [Marginalia: "I believe in copper in sheet [unclear] to gave surface as well as conductivity + insulate the same + make a good ground"]
- Author
- Kuehling, J H
- Recipient
- Edison, Thomas Alva
- Date
- 1888-04-20
- Type
- Letter
- Folder ID
- D8822-F
- Microfilm ID
- 122:721
- Document ID
- D8822AAQ
- Publisher
- Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
- Has Version
- Archive.org Viewer, Microfilm Series Reel 122