Making a Telegraph with Stone Age Tools
The suited guy in the video is an employee from the office of materials that goes into the wilderness to test if it would have been possible to create a fully functioning telegraph with stone-age tools.
Guess what? Using no modern tools or materials and relying entirely on material found on the ground in the wilderness, a telegraph switch producing .7 volts of electricity was completed. This shows that – if only one had the right knowledge –
an entire telegraphic network could have been constructed in the stone age.
Now our suited friend only has to wait for another stone-ager to create a second telegraph so he has someone to communicate with. Perhaps smoke signs would have been a better plan? Anyhow it is comforting to see that the presence of human knowledge and skill is more decisive than the existence of manufacturing infrastructure.