I can vouch for the continued usage of "phlogiston" even today: my French-Canadian in-laws, in northern Quebec, refer to rubbing creams like Ben-Gay as "anti-phlogistine" .

Now, mind you, my mother-in-law still insists that we shut the windows during thunderstorms so that the lightning doesn't get in. They're not exactly what we'd consider "scientifically advanced." And they still play that archaic card game, euchre...