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Solucionar las épocas para este rompecabezasFotoThe first "friction match" was invented by English chemist John Walker in 1827. Early work had been done by Robert Boyle in the 1680s with phosphorus and sulfur, but his efforts had not produced useful results. Walker discovered a mixture of antimony sulfide, potassium chlorate, gum, and starch could be ignited by striking against any rough surface. Share this Jigsaw Puzzle | Rompecabezas recientesSentado Pink Flowers on WallFri Bird Orange CrestThu Beachside Chairs SunnyWed Lion Blue Oil ArtTue Rubber Duck WaveLunes Storm in a TeacupSol Colorful Doughnuts Rompecabezas más anteriores | |
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