Florida ocean temperatures peak to almost 100 degrees amid heatwave: "You really can't cool off" - eviltoast
  • AnUnusualRelic@lemmy.world
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    1 year ago

    I suppose they had little booklets. A bit like the logarithmic tables that people kept for complicated calculations. Maybe they were issued on the first day of school or something. People would keep them all their life and look at them surreptitiously whenever they had to convert units.