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As principle behind this think about your old light bulb. One emergency method of lighting a fire used to be to break the glass of the light bulb in your flashlight and burn the filament, no more no less than the way its done with a strand of steel wool for example. Now, when you put the filament between positive and negative there will be some resistance in ...


3

Five hours from San Francisco is enough to reach a good chunk of the Sierras and even further north in the area of Lassen and Shasta. There are large areas of national forest within this range. Generally the national forests will have less restrictions than national parks, particularly popular ones like Yosemite. Each national forest will have its own ...



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