Meredith builds a solar furnace

The Wireless Okapi Models that work with the Okapi Apps: Buy them from our website! http://www.greenhillenvirotechnologie... Get your Okapi Solar Calculator App from Google Play! https://play.google.com/store/apps/de... We have written a Comprehensive and Not Boring "Guide", (including a list of materials, diagrams, important steps of construction and a little humor,) for this solar furnace design. You may view this free "Guide" here: http://www.greenhillenvirotechnologie... Be the first to truly demonstrate the performance of your solar heater. Make the Next Generation Proud!