To produce a flame, all you need is some sort of lens to focus sun on a particular spot

To produce a flame, all you need is some sort of lens to focus sun on a particular spot 4. Flint and Metal This really is an old standby. Ita€™s always a good concept to carry around good flint and steel set to you on a camping excursion. Matches get wet and stay being literally …

To produce a flame, all you need is some sort of lens to focus sun on a particular spot Read More »