Small addendum: at least in Germany, early telephone wires (up until the 1950s?) were wrapped in paper, drenched in oil. The bundles were then enclosed in a lead-copper alloy to protect them from moisture.
https://commons.wikimedia.org/wiki/File:KabelbaumFMAachen_49...
Small addendum: at least in Germany, early telephone wires (up until the 1950s?) were wrapped in paper, drenched in oil. The bundles were then enclosed in a lead-copper alloy to protect them from moisture.
https://commons.wikimedia.org/wiki/File:KabelbaumFMAachen_49...