|Vintage Ad Browser|
Putnam Dry-Cleaner was a "soap-like preparation that works in gasoline." According to other ads, you put some gasoline in a pan with the stuff and did a little "dipping and rinsing."
And yes indeed, dry cleaning with gasoline was discovered by chance, in the 1880s, by a French dye-maker called Jean Baptiste Jolly. His maid spilled kerosene on a tablecloth and Jolly noticed that after that, it looked cleaner.
This sort of dry cleaning was, of course, very dangerous. It wasn't until after the First World War that less flammable dry cleaning agents were developed. I am going to direct you to Wikipedia if you are entranced with dry cleaning history and want more details. I'm just glad that we don't dip our finest things in gasoline - in the kitchen, probably! - any more.
And that was good news for Marie Antoinette.