cigarettes were once thought to be healthy promoted as being good for health, till early 1950s. : r/HistoricalCapsule When Smoking Was Healthy -

Since one cigarette produces 1000 to 15000 g of PM (tar content of 1 to 15mg), a direct relationship with the PM concentration in Beijing air pollution can be made

8285 Nitrosamines form through reactions of nitrite with amino groups

introduced a "swim-pipe" resembling Kramarenko and Wilen's side-mounted ball-float- and flutter-valve breathing tube design, urging children and adults to "try the human version of the submarine snorkel and be like a fish"

This story holds that James B

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Fagerroos, kirjoitusteline, hopeaa ja lasia, Helsinki 1881