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oil pan 4 05-18-2021 08:58 PM

Ancient precision
 
Evidence of ancient high precision
Get interesting at 23 minutes in.
No one seems to be able to demonstrate how one can make a corundum vase to high precision and drill handle holes through it or make a dish out of granite so thin it's kind of transparent with copper chisels, wooden hammers and stone pounding blocks.

freebeard 05-18-2021 10:38 PM

As soon as I saw the thread title I thought Seraphium and the Schist disk.

I'm only 38 minutes in but I am being driven from the house by the need for groceries. My theory for the control they had over surfaces is Electrical Discharge Machining.

edit:
The Unusual Earth Orbit Circling Above Our Ancient Past
Precise orbit from antiquity? At 13:30 he mentions the precision machining.

oil pan 4 05-28-2021 09:37 AM

How to rebuild society after the solar micro nova?

www.youtube.com/watch?v=SOw9WqMOHjA"]https://www.youtube.com/watch?v=SOw9WqMOHjA[/URL]

Back in the old days any blacksmith could make a sword or armor, the bad ass blacksmiths made the files.

freebeard 05-28-2021 01:09 PM

Clickspring is awesome. It makes you appreciate being able to pick up inexpensive tools at Harbor Freight.

His pneumatic fire starter is interesting.


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