1825 granite bed lathe - photos

[mwmkravchenko]

That could be called rock solid.

Recon the fixture off to the left in the top photo with the bicycle crankset was for sharpening tools?

I would be making the same guess. Looking like a grinding wheel.

[Philip Davies]

Is any mason willing to divulge how the granite was worked? With machinery? Or laboriously sawing, scraping, etc? (Serious question)

[mwmkravchenko]

Could be worked with time honored methods of quarrying and then lapping. Still done today, albeit by machine.