by kilroy » Fri Jul 24, 2009 7:02 pm
most worthwhile survival guides offer much more practical info.
example: the solar water still
In the deserts of the world, with a plastic sheet six feet square, up to three pints of water a day can be extracted from a bowl-shaped cavity some twenty-inches deep and forty inches across. Place a cup, can, upturned hat, or other receptacle in the center of the hole. Anchor the plastic all the way around the top of the opening with dirt or stones. Set a fist-sized rock in the center of the sheet so that the plastic will sag in a point directly over the container.
Heat from the sun shines through the plasitc and is absorbed by the sand, causing the evaporation of the moisture already in the earth. The vapor is almost immediately condensed on the cooler underneath side of the plastic, the drops flowing down the underside of the steeply angled sheet and dripping into the ready container. Capillary action causes more water to be attracted to the surface of the sand to repladce that which has gone, and the process will go on.
Two such still will, When operating well, keep a man going in the desert, for even when the production lessens after a day or two, it is a simple matter to move the still. Production will even continue at night at about half the rate of the daytime flow.
Varying with the condition of the soil, the amount of water you can expect to extract in a twenty-four-hour day wil be from somewhat less than a pint to three pints. But you can help the process along, particularly if you have selected a hollow or dry wash for your location.
You'll get even more fluid by cutting cacti and other water-holding desert plants into pieces and dropping them under the plastic. The rate of output can thus be increased up to nearly three times that of the sand alone. Even contaminated water such as urine, seawater, and radiator fluid not diluted with such a highly volatile substance as antifreeze can be purified if poured into the hole and allowed to vaporize and drip in the heat.
Seawater in the bottom of a boat can be vaporized and condensed in pur drinkable form by this same method. Incidentally, no matter where you conduct this operation, remove the plastic as seldom as possible, as it takes half an hour or more for the air to become resaturated and the production of water to start once more.
see, useful info that can be easily practiced before being in an emergency situation. you're just being a moldramatic hater.
when they ask how you feeling
you tell em you feeling like something important died screaming
you tell em you feeling like something even more important arrived breathing
something you should probably try feeding