• SpaceCowboy@lemmy.ca
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    1 day ago

    Vikings also believed that drinking cod liver oil would make them stronger. Turns out, cod liver oil is high in vitamin D which mitigates seasonal depression which is kinda important in northern latitudes.

    • Buddahriffic@lemmy.world
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      10 hours ago

      Trial and error existed before science was a thing, even if medieval academics were idiots who thought seniority was more important than observations and the reasoning used to “explain” things was often as dumb as the reasoning in the OP.

      It’s how garlic and salt got a reputation of warding off evil spirits because food rotting seemed like it was caused by ghosts to people who had no idea microbes existed, and salt and garlic had anti-microbial properties, which reduced or slowed the occurrence of rot and/or mold.

      Of course, from there it got taken to ridiculous levels, like people thinking a ring of salt protects them from non-existent beings or garlic frightens off other non-existent beings. But it all started from noticing that meat lasted longer for those with good access to salt (or something along those lines).

  • Hellfire103@lemmy.ca
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    2 days ago

    “CaN i PiCk AnOtHeR oPtIoN”

    Bitch, you came looking for silver and found gold.

      • Rose@slrpnk.net
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        2 days ago

        You need to be able to pick the recipe option then. If someone knows recipes from ancient Rome, they might just be a harmless history nerd. If someone knows recipes from WH40K, well, I don’t know what to say.

        • GoodLuckToFriends@lemmy.today
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          2 days ago

          Wouldn’t 40k, depending on who and where, be something like, “Open meal package. Place 200g water in package. Close package and shake for 40 seconds. Open package and eat.” Civilian worlds you can just make up whatever, just like the scenario designers do. Want a US-lite world? Got one. Want a world reminiscent of 1800s UK? Got two.

        • CatLikeLemming@lemmy.blahaj.zone
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          1 day ago

          In terms of 40K recipes, corpse starch is pretty easy. De-bone a (generally human, but others can work in a pinch) corpse, grind up the rest, add salt, and pack it in a can.

  • Thorry84@feddit.nl
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    2 days ago

    Is this actually true? Because all the YouTube videos I’ve seen of people trying to make iron in primitive ways have the issue of too much carbon in the iron. This causes the iron to be very brittle and hard to work. The trick about making good steel is to get just the right amount of carbon.

      • Thorry84@feddit.nl
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        2 days ago

        You know you are in for a good time when you get to the chapter called “Sexual connotations”.

        I’m not an expert on the field, so I’ve read the paper, but am not qualified to draw conclusions from it. But as I read it, the focus is more on the role of ritual and religion in the making of the iron. And the transfer of knowledge through this process and hypothesize the addition of the burning of bone is actually beneficial.

        However they do not approach this from a material technology standpoint. So I would love for someone with knowledge on this point to chime in. It’s very interesting if the people back in the day knew how to make low carbon iron and the little bit of carbon they did add came from the burning of the bones. But as I see it the burning of the bones is more a ritual kind of thing and getting all of the carbon out of the iron is the harder thing to do, not putting the carbon in.

        • entwine413@lemm.ee
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          2 days ago

          Bone char isn’t super high carbon, so it’s possible that either the calcium phosphate or calcium carbonate is playing a roll.

          But honestly, you’re probably not getting very much of it mixed in from primitive smelting or forging methods.

          • snooggums@lemmy.world
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            2 days ago

            Low carbon is actually a good thing to help avoid including too much and making the steel brittle.

          • Adalast@lemmy.world
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            2 days ago

            I am by no means a material scientist or biologist, but I have studied a lot of them and have some curiosities.

            It would be interesting to see how calcium doping modified the properties of the alloy. AFAIK the temperatures that iron smelts at is to high for the carbonate or phosphate bonds to remain stable, so most of it should have ended up as free calcium or phosphorus.

            I also imagine that the type of bones have a lot to do with it, since avian bones have a different composition and density than say, a moose bone. Different kinds of animals also have evolved different metal doping concentrations.

    • barsoap@lemm.ee
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      1 day ago

      You need >700C to decarburise iron you don’t need much for that but coal and a fan, i.e. a bloomery. Pretty much defines the beginning of the iron age. Getting very low-carbon iron is quite easy, you just need enough fuel and air, the trick is then adding the right amount of carbon back. Also, getting rid of impurities, slag inclusions, etc, long story short: Lots of hammering and folding different carbon grades together, though some work can be saved by building very large bloomeries and processing very large batches producing quite slag-free low-carbon iron which then can be case-hardened.

      The way out of that is crucible steel, melting your ingredients in an air-tight crucible, but that requires advanced furnace technology that somehow noone came up with before industrialisation, with the exception of India. The banding btw is due to alloy not production method (though you need to follow specific steps to bring out the banding).

    • Tlaloc_Temporal@lemmy.ca
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      2 days ago

      Also remember that carbon is lost as the metal is worked, so the strength can be increased simply by working the metal longer. This is how wrought iron is produced, although wrought iron ends up having a much lower carbon content in the process of removing slag.