#focalpoint Yes, the survival guy on cable demonstrated that effectively. #TeacherOfHeaven. Put paper to catch sun's rays from aluminum foil on concave side of trash lid. At focal point, paper will catch fire.
John Rubens added,
Gary Loper@GaryLoper
Concentrate all yr thoughts upon the work in hand. The sun's rays do not burn til brought to a focus ~ Alexander Graham Bell #productivity
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