Another jaw dropping exposition of knowledge by David Cohen. I love the origin of the word 'gas' as ghost. I found the idea that they rioted against Priestly as totally transforming my reading of this scientist. It seems historical fact that he discovered so many (ten) new gases. The idea of a floral clock is just amazing. Flowers opening at the hour. It is great. MP4 recording     MP3 recording -- -- Your browser does not support the audio element.