From the Author:
Tim MacWelch, founder and head instructor of Advanced Survival Training, has had a love of the outdoors from a young age, growing up on a farm in the rolling hills of Virginia. Eating wild berries, fishing for trout and learning about the animals of the forest were an everyday part of his country life. Tim has been an active practitioner of survival and outdoor skills for over twenty-four years; and he has been actively teaching survival skills for the past 16 years. Tim and his wilderness school have been on Good Morning America and National Geographic, and featured in several publications including Conde Nast Traveler Magazine and the Washington Post newspaper. Tim has written articles for Outdoor Life magazine, The Virginia Sportsman newspaper, and for several blogs and online survival sites. At the beginning of 2011, Tim became the head contributor for the Outdoor Life Survival website, and providing them with 3 articles per week, every week.
Excerpt. © Reprinted by permission. All rights reserved.:
TIP 111: BUILD A SOLAR STILL
The solar still is a simple invention that collects water and distills through a greenhouse effect. It’s not perfect, nor does it collect massive quantities of water, but it does provide fresh water in arid climates and it can effectively desalinate saltwater.
In the original method developed in the 1970s, a square of clear or milky plastic is draped over a pit with a clean cup in the bottom. The plastic at the edge of the pit is sealed with a rim of dirt or stones to keep any of the steam from escaping. The plastic sheet is weighed down in the middle with a small rock, pushed down to shape the plastic into a cone shape. The sun will create a steamy environment under the plastic, and the steam will condense on the underside, running down into the cup below. Each site works for days, and you may get a up to a liter of water per still per day.
STEP 1 Set up the still in a sunny area with the dampest dirt or sand available.
STEP 2 Make certain that the point of the cone of plastic is directly over the container inside the still.
STEP 3 Add vegetation inside to increase production.
STEP 4 Urine can be recycled by peeing down a hole dug next to the still so the liquid can soak through the ground and vaporize into the still.
STEP 5 A rubber, plastic, or vinyl drinking tube can be placed in the cup and lead outside the still. This way, water can be sipped as it collects without having to take the whole still apart to get the water out.
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