Scientific Illustrations Deuteronomy 13:1-3 If there arise among you a prophet, or a dreamer of dreams, and gives you a sign or a wonder,… Every substance is discoverable by some "test," which usually neutralises it, or rather, by uniting with it, forms a new compound. The whole fabric of chemistry rests upon this wonderful principle as one of its cornerstones. Thus if the least fragment of copper be dissolved in acid, and the fluid be then diluted with water until no trace of colour remains, so potent, nevertheless, is the affinity of the well-known fluid called "ammonia" for the copper, that a single drop of the latter fluid will immediately reveal the presence of the metal by uniting with it and forming a new substance of the loveliest violet colour. Similarly, if a morsel of lead be dissolved in acid, and the acid be then diluted with water, a single drop of a solution of iodide of potassium will turn the whole to a brilliant crocus-yellow. The presence of iron, after the same manner, is discovered by the least drop of tincture of galls, which blackens it upon contact; that of silver by a little solution of common salt, which causes flakes of imitative snow to make their appearance; that of mercury again with iodide of potassium, which turns the fluid containing it to a beautiful red. (Scientific Illustrations.) Parallel Verses KJV: If there arise among you a prophet, or a dreamer of dreams, and giveth thee a sign or a wonder, |
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