Georg Agricola. De Re Metallica. 1556.
Is this the most improvised way to melt and cast aluminum ever!
We attempted to make a furnace out of a flowerpot!
WWV Steel Mill on Flickr.
https://www.flickr.com/photos/shannxn/
Kaleidoscope Study: Himalayan Salt Lamp
This is a vintage wood furnace from a restaurant in Cartago, Costa Rica. They make delicious roasted chicken and pork in it, and all the ingredients (including the wood) are local and sustainable.