Video: Recreating the Burning Glass

[Paul Ferguson]

"In this video I do my best to recreate a "Burning Glass" in the style of Joseph Priestley's from 1774. while I do this we talk about the long history of the tool, and finally test the glass by attempting to reproduce some alchemical processes such lenses may have been turned to in the past."

https://www.youtube.com/watch?v=mz-iKEMWQKE