In France, a chemist named Pilatre de Rozier tested the flammability of hydrogen by gulping a mouthful and blowing across an open flame, proving at a stroke that hydrogen is indeed explosively combustible and that eyebrows are not necessarily a permanent feature of one's face.
Bill Bryson (2014). “A Short History of Nearly Everything”, p.60, Lulu Press, Inc
![In France, a chemist named Pilatre de Rozier tested the flammability of hydrogen by gulping a mouthful and blowing across an open flame, proving at a stroke that hydrogen is indeed explosively combustible and that](http://cdn.quoteddaily.com/images/bill-bryson/in-france-a-chemist-named-pilatre-de-rozier-tested-the-flammability-of-hydrogen-by-gulping-a-mouthful-and-blowing-across.jpg)