Han Maenen wrote in USMA 22469: > >Traders have vested interests in blocking change, so they sabotage it as >much as possible. Marketers have kept the stupid horsepower alive and >kicking. In France, in the nineteenth century, traders almost killed >metric and after decades of misery, the only way was to impose metric on >trade by law in 1837. Private persons have never been prosecuted for using >illegal units of measurement.
The law making metric compulsory in France was passed in 1837, but took effect from January 1, 1840.
