Part 2—Sniffer Squads on the Odour Trail: Smog in Frankfurt The fog phenomenon seen, and smelled, in London in the late 1800s had still not been eradicated by the midpoint of the next century. On the night of 22 January 1957, mysterious events occurred in Frankfurt am Main that were similar to those in Victorian London. As ‘all Frankfurt daily newspapers unanimously’ reported, adults, and especially children, were afflicted by headaches, dizzy spells, and nausea, while passers-by stagge...