Public
- Public
- Network
- Groups
- Featured
- Popular
- People

Conversation

Notices

Embed this notice
Evan Prodromou (evan@prodromou.pub)'s status on Friday, 25-Nov-2022 07:44:52 JST Evan Prodromou
in reply to
- acroll
@acroll wow, it's beautiful!

In conversation Friday, 25-Nov-2022 07:44:52 JST from prodromou.pub permalink
- Embed this notice
  acroll (acroll@nerdculture.de)'s status on Friday, 25-Nov-2022 07:44:54 JST acroll
  
  With this image of the Arago kilogram, I’m going to start posting to #masstodon.
  In conversation Friday, 25-Nov-2022 07:44:54 JST permalink
  Attachments
  1. The Arago Kilogram, one of the first metric standards used by the United States. It was procured by the US from France in 1821 to serve as primary standard for metric weights. It was made of platinum by the French firm Fortin and certified by French physicist François Arago to be within 1 mg of the "Kilogram of the Archives", the French prototype standard defining the kilogram.
    https://nerdculture.de/system/media_attachments/files/109/401/103/970/862/804/original/f83652bdc189fb9a.jpeg

Feeds