Actual poster from 1917 that made me laugh. A lot.

Also, those motherfuckers are measuring the weight of those balls in kilograms, aren’t they?

  • Omgpwnies@lemmy.worldEnglish
    2·
    2 年前

    The really neat thing about those changes to the meter is that it didn’t really change how long a meter was (-ish), it changed the precision of that definition, as well as the ability to reproduce an exact meter, reducing the need for a specific piece of material to define the meter (which changes length based on environment). Now, an exact standard meter can be reproduced independently in any lab with the proper equipment.

    • Bgugi@lemmy.world
      3·
      2 年前

      What’s especially wild is that the kilogram was still an artifact in 2019! Every single calibrated weight in the world, big and small… They all could be traced back to a single metal chunk in a french vault.