Pictures and albums about Boettger published in travel
Albums about boettger
Pictures about boettger
picture: IMG_0162
published by: oliverjcomo
Boettger's burning glass. With this or a very similar model, Boettger was able to reach high enough temperatures to make porocelain.
picture: IMG_0695
published by: oliverjcomo
This parabolic "burning mirror" focuses light (and also sound) like a lens. It was used by Johann Friedrich Böttger, perhaps in his porcelain experiments.