Elegir un corte del rompecabezas |
. |
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 recientesThu Skier Speed SelfieWed Horse DreamTue Birds on Barbed WireLunes Lilies on BlueSol Rolls Royce SpectreSentado Spaceman in DaisiesFri Kitten Sleeping in Wool Rompecabezas más anteriores | |
Casero|Galería del rompecabezas|Rompecabezas diario|Mapa de sitio|Política de aislamiento|Preguntas con frecuencia hechas© JigZone.com 2006 del copyright (ningunas imágenes en este sitio se pueden copiar sin el permiso del dueño) |