Over time things like machine tools have gotten more accurate, ie I assume early metalworking lathes had a much higher range of error than modern ones.
So how were the more accurate machines made using what must have been a less accurate machine?
In: Engineering
If you’re interested, there’s a great book on it how we got more precise over the centuries in everything like measuring distance, weight, time, etc. Precision machining enabling steam engines (and better artillery), precision time keeping enabling better nautical navigation, precision measuring to detect gravity waves, etc.
[The Perfectionists: How Precision Engineers Created the Modern World](https://www.goodreads.com/book/show/35068671-the-perfectionists)
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