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Registered Member #193
Joined: Fri Feb 17 2006, 07:04AM
Location: sheffield
Posts: 1022
Take a look at an ice cube. It's full of bubbles. That's what's going to limit how good your lens is. The only way I can think of to mke permanganate or glycerine starts off by assuming you can heat things ie that you have a fire. What were these materials for again? I put in the idea of smelting copper for a reason; if you couldn't do it with stone age technology then we wouldn't have got to the bronze age. If your bit of wilderness doesn't have copper ore then you are stuck in the stone age unless you can smelt iron. You might just manage that; I'm not sure I could.
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3141
I had some 'country' relatives who showed me a bit of chemistry, if unsure of wild mushrooms boil them with some onion if the onion goes black, don't eat the mushrooms. (I've no idea if this is true/reliable, most of my mushrooms come from the shop/supermarket)
That reminds me, for very small mushrooms; crush the stem between finger and thumb to expose to the air, if the stem goes purple then you've got some 'interesting' mushrooms (psilosybin)
Registered Member #27
Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
Mushrooms needs a very high level of care for several reasons. They are not consistent from place to place, so advice that is safe one place may be very unsafe another place. Some types of mushrooms that have been considered safe for hundreds of years have turned out to be unsafe under certain conditions, so don't trust a books completely.
There are probably 10 different poisons so even if onions should happen to detect poison in one case they will probably fail the 9 other cases.
You can extract dyes from different kinds of lichen and use it to colour wool. Many plants contains chemicals that can be extracted without too complicated procedures.
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Wilderness Chemistry
