Pencil, hardness, test, versus ,Brinell, hardness, of, lead, alloys, Using a Pencil to find out the hardness of a lead alloy. This is useful in reloading. Buying a hardness tester is better and way more expensive. But this will get you in the ball park. Lee Precision Lead Hardness Test Kit. http://amzn.to/28RK1jT Staedtler Lumograph Graphite Drawing and Sketching Pencils http://amzn.to/28XFMCg Get the chart here http://tinyurl.com/z6gmgxl The music is “So…
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Foraging for wild edibles
My recommendation is to find a good field guide for your region and/or take a course from a knowledgeable local expert. Just remember, do note consume ANY plant material that you cannot identify with complete certainty. You only have to be wrong once in order to find yourself in a world of hurt. I will add more links to online sources as I find them. Online Resources –…
Silent rooftop wind turbines could generate half of a household’s energy needs
Please take a look at this. http://www.treehugger.com/wind-technology/silent-wind-turbines-could-generate-half-household-energy.html